Attachment 362280 Details for Bug 194770 – Patch (applies on top of 362274)

[patch] Patch (applies on top of 362274)

0001-Update-WPT-tests-for-embedded-content.patch (text/plain), 205.78 KB, created by Frédéric Wang (:fredw) on 2019-02-18 02:39:36 PST

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Creator: Frédéric Wang (:fredw)

Created: 2019-02-18 02:39:36 PST

Size: 205.78 KB

patch

obsolete

>From c3db067f0e4dbf5078f25cf65a5253a6dc054e14 Mon Sep 17 00:00:00 2001
>From: Frederic Wang <fwang@igalia.com>
>Date: Mon, 18 Feb 2019 11:35:42 +0100
>Subject: [PATCH xserver] Update WPT tests for embedded content
>
>---
> LayoutTests/TestExpectations                  |   1 -
> .../w3c/resources/import-expectations.json    |   1 +
> .../w3c/resources/resource-files.json         |   1 +
> .../html/semantics/embedded-content/META.yml  |   3 +
> .../hash-name-reference.html                  |  45 ++
> .../image-map-processing-model/w3c-import.log |  17 +
> .../image-maps/w3c-import.log                 |   2 +-
> .../embedded-content/resources/w3c-import.log |   2 +-
> ...nsicsize-svg-image.tentative-expected.html |  22 +
> .../intrinsicsize-svg-image.tentative.html    |  24 +
> .../svg/intrinsicsize/w3c-import.log          |  18 +
> .../the-area-element/resources/w3c-import.log |  17 +
> .../the-area-element/support/w3c-import.log   |   2 +-
> .../the-area-element/w3c-import.log           |   2 +-
> .../the-audio-element/w3c-import.log          |   2 +-
> .../size.attributes.parse.whitespace.html     |   6 +-
> .../the-canvas-element/w3c-import.log         |   3 +-
> ...-getters-return-null-for-cross-origin.html |  14 +
> .../embed-represent-nothing-04-expected.html  |   7 +
> .../embed-represent-nothing-04.html           |  20 +
> .../the-embed-element/w3c-import.log          |   5 +-
> ...-getters-return-null-for-cross-origin.html |  13 +
> .../the-frame-element/w3c-import.log          |  17 +
> ...ument_changes_only_after_load_matures.html |  15 +-
> ...e.html => cross_origin_parentage.sub.html} |   2 +-
> ...-getters-return-null-for-cross-origin.html |  17 +
> .../the-iframe-element/iframe-allow.html      |  66 +++
> .../iframe-allowfullscreen.html               |  56 ++-
> .../the-iframe-element/iframe-nosrc.html      |  26 ++
> .../iframe_javascript_url_01.htm              |  12 +-
> .../the-iframe-element/iframe_remove_src.html |  40 ++
> ...iframe_sandbox_allow_top_navigation-1.html |  28 +-
> ...iframe_sandbox_allow_top_navigation-2.html |  29 +-
> ...iframe_sandbox_allow_top_navigation-3.html |  28 +-
> .../src-repeated-in-ancestor.html             | 138 ++++++
> .../iframe-that-checks-contentDocument.html   |   3 +
> .../support/load-into-the-iframe.html         |  19 +
> .../the-iframe-element/support/w3c-import.log |   4 +-
> .../the-iframe-element/w3c-import.log         |   9 +-
> .../404-response-with-actual-image-data.html  |  18 +
> .../404-response-with-actual-image-data.py    |   3 +
> .../the-img-element/Image-constructor.html    |   5 +
> .../available-images-expected.html            |   2 +
> .../available-images-onload.html              |  33 ++
> .../the-img-element/available-images.html     |  17 +
> .../current-pixel-density/w3c-import.log      |   2 +-
> .../decode/image-decode-iframe.html           |  54 +++
> ...age-decode-path-changes-svg.tentative.html |  82 ++++
> .../decode/image-decode-path-changes.html     | 121 +++++
> .../decode/image-decode-picture.html          | 133 ++++++
> .../decode/image-decode-svg.tentative.html    | 128 ++++++
> ...ecode-with-quick-attach-svg.tentative.html |  23 +
> .../image-decode-with-quick-attach.html       |  26 ++
> .../the-img-element/decode/image-decode.html  | 138 ++++++
> .../the-img-element/decode/w3c-import.log     |  24 +
> .../environment-changes/viewport-change.html  |   2 +-
> .../environment-changes/w3c-import.log        |   2 +-
> .../the-img-element/img.complete.html         |  26 +-
> ...size-with-responsive-images.tentative.html |  96 ++++
> ...out-unsized-media.tentative.https.sub.html |  66 +++
> ...zed-media.tentative.https.sub.html.headers |   1 +
> .../intrinsicsize/w3c-import.log              |  19 +
> .../the-img-element/invalid-src.html          |   4 +-
> .../the-img-element/ismap/w3c-import.log      |   2 +-
> .../the-img-element/null-image-source.html    |  30 ++
> .../the-img-element/relevant-mutations.html   | 416 ++++++++++++++++++
> .../the-img-element/resources/w3c-import.log  |   2 +-
> .../parse-a-sizes-attribute-display-none.html |   7 +
> .../parse-a-sizes-attribute-quirks-mode.html  |   7 +
> ...arse-a-sizes-attribute-standards-mode.html |   7 +
> .../parse-a-sizes-attribute-width-1000px.html |   7 +
> .../sizes/parse-a-sizes-attribute.html        |  42 --
> .../sizes/sizes-dynamic-001-expected.html     |   4 +
> .../sizes/sizes-dynamic-001.html              |  20 +
> .../sizes/sizes-dynamic-002-expected.html     |   4 +
> .../sizes/sizes-dynamic-002.html              |  33 ++
> .../sizes/support/parse-a-sizes-attribute.js  |  29 ++
> .../{ => support}/sizes-iframed.sub.html      |  11 +
> .../sizes/support/w3c-import.log              |  18 +
> .../the-img-element/sizes/w3c-import.log      |  12 +-
> .../srcset/srcset-media-dynamic.html          |  25 ++
> .../the-img-element/srcset/w3c-import.log     |   3 +-
> .../fail-to-resolve.html                      |  25 ++
> .../update-the-image-data/w3c-import.log      |  17 +
> .../the-img-element/w3c-import.log            |   9 +-
> ...-getters-return-null-for-cross-origin.html |  17 +
> .../the-object-element/object-events.html     |  80 ++++
> ...ck-failed-cross-origin-navigation.sub.html |  52 +++
> .../object-setcustomvalidity.html             |  17 +
> .../the-object-element/w3c-import.log         |   6 +-
> .../the-video-element/intrinsic_sizes.htm     |  75 ++++
> ...out-unsized-media.tentative.https.sub.html |  39 ++
> ...zed-media.tentative.https.sub.html.headers |   1 +
> .../intrinsicsize/w3c-import.log              |  18 +
> .../the-video-element/w3c-import.log          |   3 +-
> .../semantics/embedded-content/w3c-import.log |  17 +
> LayoutTests/platform/mac-wk1/TestExpectations |   2 -
> LayoutTests/tests-options.json                |  15 +
> 98 files changed, 2684 insertions(+), 149 deletions(-)
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/META.yml
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/image-map-processing-model/w3c-import.log
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/intrinsicsize-svg-image.tentative-expected.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/intrinsicsize-svg-image.tentative.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/w3c-import.log
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/resources/w3c-import.log
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/document-getters-return-null-for-cross-origin.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-04-expected.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-04.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-frame-element/document-getters-return-null-for-cross-origin.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-frame-element/w3c-import.log
> rename LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/{cross_origin_parentage.html => cross_origin_parentage.sub.html} (80%)
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/document-getters-return-null-for-cross-origin.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allow.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-nosrc.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_remove_src.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/src-repeated-in-ancestor.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-checks-contentDocument.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/load-into-the-iframe.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/404-response-with-actual-image-data.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/404-response-with-actual-image-data.py
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images-expected.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images-onload.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-iframe.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes-svg.tentative.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-picture.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-svg.tentative.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach-svg.tentative.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/w3c-import.log
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-with-responsive-images.tentative.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html.headers
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/w3c-import.log
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/null-image-source.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-display-none.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-quirks-mode.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-standards-mode.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-width-1000px.html
> delete mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-001-expected.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-001.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-002-expected.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-002.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/parse-a-sizes-attribute.js
> rename LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/{ => support}/sizes-iframed.sub.html (93%)
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/w3c-import.log
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/srcset-media-dynamic.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-the-image-data/fail-to-resolve.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-the-image-data/w3c-import.log
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/document-getters-return-null-for-cross-origin.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-events.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-fallback-failed-cross-origin-navigation.sub.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-setcustomvalidity.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsic_sizes.htm
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html.headers
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/w3c-import.log
> create mode 100644 LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/w3c-import.log
>
>diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
>index c2c19fb1153..32b77fb83b7 100644
>--- a/LayoutTests/TestExpectations
>+++ b/LayoutTests/TestExpectations
>@@ -1035,7 +1035,6 @@ imported/w3c/web-platform-tests/html/dom/elements/global-attributes/dir_auto-tex
> 
> imported/w3c/web-platform-tests/html/dom/dynamic-markup-insertion/opening-the-input-stream/010.html [ Failure Timeout ]
> imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/environment-changes/viewport-change.html [ Failure ]
>-imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute.html [ Pass Failure ]
> 
> # Imported Mozilla SVG tests
> webkit.org/b/5968 imported/mozilla/svg/linearGradient-basic-03.svg [ ImageOnlyFailure ]
>diff --git a/LayoutTests/imported/w3c/resources/import-expectations.json b/LayoutTests/imported/w3c/resources/import-expectations.json
>index 632766a79e9..4232bd4b060 100644
>--- a/LayoutTests/imported/w3c/resources/import-expectations.json
>+++ b/LayoutTests/imported/w3c/resources/import-expectations.json
>@@ -195,6 +195,7 @@
>     "web-platform-tests/html/rendering": "skip", 
>     "web-platform-tests/html/semantics/document-metadata/the-meta-element/pragma-directives": "skip", 
>     "web-platform-tests/html/semantics/document-metadata/the-meta-element/pragma-directives/attr-meta-http-equiv-refresh": "import", 
>+    "web-platform-tests/html/semantics/embedded-content": "import", 
>     "web-platform-tests/html/semantics/embedded-content-0": "skip", 
>     "web-platform-tests/html/semantics/embedded-content/image-maps/image-map-processing-model": "skip", 
>     "web-platform-tests/html/semantics/embedded-content/media-elements": "import", 
>diff --git a/LayoutTests/imported/w3c/resources/resource-files.json b/LayoutTests/imported/w3c/resources/resource-files.json
>index 921f274169a..3603fafb09a 100644
>--- a/LayoutTests/imported/w3c/resources/resource-files.json
>+++ b/LayoutTests/imported/w3c/resources/resource-files.json
>@@ -1012,6 +1012,7 @@
>         "web-platform-tests/html/semantics/embedded-content/the-iframe-element/same_origin_child.html",
>         "web-platform-tests/html/semantics/embedded-content/the-iframe-element/same_origin_grandchild.html",
>         "web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/blank.htm",
>+        "web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-checks-contentDocument.html",
>         "web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-opens-modals.html",
>         "web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-performs-top-navigation-on-popup.html",
>         "web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-performs-top-navigation-without-user-gesture-failed.html",
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/META.yml b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/META.yml
>new file mode 100644
>index 00000000000..199c4c412fe
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/META.yml
>@@ -0,0 +1,3 @@
>+suggested_reviewers:
>+  - foolip
>+  - zcorpan
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html
>new file mode 100644
>index 00000000000..e1ce253c32d
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html
>@@ -0,0 +1,45 @@
>+<!DOCTYPE html>
>+<meta charset="utf-8">
>+<title>parsing a hash-name reference for img and object</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<style>
>+ body { margin-top: 0 }
>+ iframe { height: 600px; width:50px; border-top: none }
>+</style>
>+
>+<div id="log"></div>
>+
>+<iframe data-name="HTML (standards)" src="hash-name-reference-test-data.html?pipe=sub&amp;doctype=html"></iframe>
>+<iframe data-name="HTML (quirks)" src="hash-name-reference-test-data.html?pipe=sub&amp;doctype=quirks"></iframe>
>+<iframe data-name="XHTML" src="hash-name-reference-test-data.html?pipe=sub|header(Content-Type, application/xhtml%2Bxml)&amp;doctype=html"></iframe>
>+
>+<script>
>+setup({explicit_done: true});
>+
>+onload = function() {
>+  var iframes = document.querySelectorAll('iframe');
>+  iframes.forEach(function(iframe) {
>+    var iframeName = iframe.getAttribute('data-name');
>+    var doc = iframe.contentDocument;
>+    var divs = doc.querySelectorAll('div[data-expect]');
>+    var div, img, object;
>+    for (var i = 0; i < divs.length; ++i) {
>+      div = divs[i];
>+      img = div.querySelector('img');
>+      object = div.querySelector('object');
>+      [img, object].forEach(function(elm) {
>+        test(function(t) {
>+          var expected = div.getAttribute('data-expect');
>+          var expected_elm = expected === 'no match' ? elm : div.querySelector('area[href="#' + expected + '"]');
>+          var got_elm = doc.elementFromPoint(elm.offsetLeft, elm.offsetTop);
>+          assert_not_equals(expected_elm, null, 'sanity check (data-expect value wrong?)');
>+          assert_not_equals(got_elm, null, 'sanity check (too many tests to fit in viewport?)');
>+          assert_equals(got_elm, expected_elm);
>+        }, iframeName + ' ' + elm.tagName + ' usemap=' + format_value(elm.useMap));
>+      });
>+    }
>+  });
>+  done();
>+};
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/image-map-processing-model/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/image-map-processing-model/w3c-import.log
>new file mode 100644
>index 00000000000..5ada8d70acc
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/image-map-processing-model/w3c-import.log
>@@ -0,0 +1,17 @@
>+The tests in this directory were imported from the W3C repository.
>+Do NOT modify these tests directly in WebKit.
>+Instead, create a pull request on the WPT github:
>+	https://github.com/web-platform-tests/wpt
>+
>+Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
>+
>+Do NOT modify or remove this file.
>+
>+------------------------------------------------------------------------
>+Properties requiring vendor prefixes:
>+None
>+Property values requiring vendor prefixes:
>+None
>+------------------------------------------------------------------------
>+List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/w3c-import.log
>index 4f69f583b1b..29f10e77a3a 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/image-maps/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/resources/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/resources/w3c-import.log
>index c11fc026698..f98b0104540 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/resources/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/resources/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/intrinsicsize-svg-image.tentative-expected.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/intrinsicsize-svg-image.tentative-expected.html
>new file mode 100644
>index 00000000000..41ddd757eca
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/intrinsicsize-svg-image.tentative-expected.html
>@@ -0,0 +1,22 @@
>+<!DOCTYPE html>
>+<meta charset="utf-8">
>+<body>
>+<svg width=200 height=200>
>+  <image href="/images/background.png" width="32" height="32"/>
>+</svg>
>+<svg width=200 height=200>
>+  <image href="/images/background.png" width="300" height="150"/>
>+</svg>
>+<svg width=400 height=400>
>+  <image href="/images/background.png" width="300" height="150"/>
>+</svg>
>+<svg width=200 height=200>
>+  <image href="/images/background.png" width="300" height="150"/>
>+</svg>
>+<svg width=200 height=200>
>+  <image href="/images/background.png" height="50" width="100"/>
>+</svg>
>+<svg width=200 height=200>
>+  <image href="/images/background.png" width="100" height="100"/>
>+</svg>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/intrinsicsize-svg-image.tentative.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/intrinsicsize-svg-image.tentative.html
>new file mode 100644
>index 00000000000..a0943169d0a
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/intrinsicsize-svg-image.tentative.html
>@@ -0,0 +1,24 @@
>+<!DOCTYPE html>
>+<meta charset="utf-8">
>+<link rel="match" href="intrinsicsize-svg-image-ref.html">
>+<meta name="assert" content="test">
>+<body>
>+<svg width=200 height=200>
>+  <image href="/images/background.png"/>
>+</svg>
>+<svg width=200 height=200>
>+  <image href="/images/background.png" intrinsicsize="300x150"/>
>+</svg>
>+<svg width=400 height=400>
>+  <image href="/images/background.png" intrinsicsize="300x150"/>
>+</svg>
>+<svg width=200 height=200>
>+  <image href="/images/background.png" intrinsicsize="300x150" width="300"/>
>+</svg>
>+<svg width=200 height=200>
>+  <image href="/images/background.png" intrinsicsize="300x150" height="50"/>
>+</svg>
>+<svg width=200 height=200>
>+  <image href="/images/background.png" intrinsicsize="300x150" width="100" height="100"/>
>+</svg>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/w3c-import.log
>new file mode 100644
>index 00000000000..034a82cf8cd
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/w3c-import.log
>@@ -0,0 +1,18 @@
>+The tests in this directory were imported from the W3C repository.
>+Do NOT modify these tests directly in WebKit.
>+Instead, create a pull request on the WPT github:
>+	https://github.com/web-platform-tests/wpt
>+
>+Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
>+
>+Do NOT modify or remove this file.
>+
>+------------------------------------------------------------------------
>+Properties requiring vendor prefixes:
>+None
>+Property values requiring vendor prefixes:
>+None
>+------------------------------------------------------------------------
>+List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/intrinsicsize-svg-image.tentative-expected.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/svg/intrinsicsize/intrinsicsize-svg-image.tentative.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/resources/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/resources/w3c-import.log
>new file mode 100644
>index 00000000000..97b74cf5934
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/resources/w3c-import.log
>@@ -0,0 +1,17 @@
>+The tests in this directory were imported from the W3C repository.
>+Do NOT modify these tests directly in WebKit.
>+Instead, create a pull request on the WPT github:
>+	https://github.com/web-platform-tests/wpt
>+
>+Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
>+
>+Do NOT modify or remove this file.
>+
>+------------------------------------------------------------------------
>+Properties requiring vendor prefixes:
>+None
>+Property values requiring vendor prefixes:
>+None
>+------------------------------------------------------------------------
>+List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/resources/area-download-click.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/support/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/support/w3c-import.log
>index 6451d29e14e..fa87b67835e 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/support/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/support/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/w3c-import.log
>index a1a61b41b1e..a03808b80fb 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-area-element/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-audio-element/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-audio-element/w3c-import.log
>index 4808d00035c..9b50b109692 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-audio-element/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-audio-element/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.whitespace.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.whitespace.html
>index 6c969f45cf4..f4662b45f94 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.whitespace.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.whitespace.html
>@@ -1,5 +1,5 @@
> <!DOCTYPE html>
>-
>+
> <title>Canvas test: size.attributes.parse.whitespace</title>
> <script src="/resources/testharness.js"></script>
> <script src="/resources/testharnessreport.js"></script>
>@@ -12,8 +12,8 @@
> 
> 
> <p class="output">Actual output:</p>
>-<canvas id="c" class="output" width="
>-	100" height="
>+<canvas id="c" class="output" width="
>+	100" height="
> 	100"><p class="fallback">FAIL (fallback content)</p></canvas>
> <p class="output expectedtext">Expected output:<p><img src="size.attributes.parse.whitespace.png" class="output expected" id="expected" alt="">
> <ul id="d"></ul>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/w3c-import.log
>index aa1b58bd51f..b52061f427e 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>@@ -102,6 +102,7 @@ List of files:
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.space.png
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.trailingjunk.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.trailingjunk.png
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.whitespace.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.whitespace.png
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.zero.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-canvas-element/size.attributes.reflect.setcontent.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/document-getters-return-null-for-cross-origin.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/document-getters-return-null-for-cross-origin.html
>new file mode 100644
>index 00000000000..89dc5d6d95f
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/document-getters-return-null-for-cross-origin.html
>@@ -0,0 +1,14 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<title>Test that getSVGDocument() returns null for a cross-origin document.</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<body>
>+<embed src='data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><rect height="100" width="100"/></svg>'></embed>
>+<script>
>+const embed = document.querySelector('embed');
>+var t = async_test('HTMLEmbedElement.getSVGDocument() for cross-origin document');
>+window.addEventListener(
>+    'load', t.step_func_done(() => { assert_equals(embed.getSVGDocument(), null); }));
>+</script>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-04-expected.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-04-expected.html
>new file mode 100644
>index 00000000000..91d680debf1
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-04-expected.html
>@@ -0,0 +1,7 @@
>+<!DOCTYPE html>
>+<meta charset="utf-8">
>+<title>Embed Reftest Reference</title>
>+<link rel="author" title="Intel" href="http://www.intel.com">
>+<body>
>+  <p>Test passes if there is <strong>no red</strong>.</p>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-04.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-04.html
>new file mode 100644
>index 00000000000..7cc1b668a6b
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-04.html
>@@ -0,0 +1,20 @@
>+<!DOCTYPE html>
>+<meta charset="utf-8">
>+<title>HTML Test: The embed element represents nothing when it has an object ancestor</title>
>+<link rel="author" title="Intel" href="http://www.intel.com">
>+<link rel="help" href="https://html.spec.whatwg.org/multipage/#the-embed-element">
>+<link rel="match" href="embed-represent-nothing-ref.html">
>+<meta name="assert" content="Check if the embed element represents nothing when it has a object ancestor that is not showing its fallback content">
>+<style>
>+  embed {
>+    background-color: red;
>+    height: 100px;
>+    width: 100px;
>+  }
>+</style>
>+<body>
>+  <p>Test passes if there is <strong>no red</strong>.</p>
>+  <object type="application/x-shockwave-flash">
>+    <embed src="/images/red-16x16.png">
>+  </object>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/w3c-import.log
>index b604365ca44..8870065ea0e 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>@@ -14,6 +14,7 @@ Property values requiring vendor prefixes:
> None
> ------------------------------------------------------------------------
> List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/document-getters-return-null-for-cross-origin.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-dimension.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-document.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-iframe.html
>@@ -27,4 +28,6 @@ List of files:
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-02.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-03-expected.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-03.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-04-expected.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-represent-nothing-04.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-embed-element/historical.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-frame-element/document-getters-return-null-for-cross-origin.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-frame-element/document-getters-return-null-for-cross-origin.html
>new file mode 100644
>index 00000000000..2628e910098
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-frame-element/document-getters-return-null-for-cross-origin.html
>@@ -0,0 +1,13 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<title>Test that contentDocument returns null for a cross-origin document.</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<script>
>+var t = async_test('HTMLFrameElement.contentDocument for cross-origin document');
>+window.addEventListener(
>+    'load', t.step_func_done(() => { assert_equals(document.querySelector('frame').contentDocument, null); }));
>+</script>
>+<frameset>
>+<frame src='data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><rect height="100" width="100"/></svg>'></frame>
>+</frameset>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-frame-element/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-frame-element/w3c-import.log
>new file mode 100644
>index 00000000000..10ac4c0c6e6
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-frame-element/w3c-import.log
>@@ -0,0 +1,17 @@
>+The tests in this directory were imported from the W3C repository.
>+Do NOT modify these tests directly in WebKit.
>+Instead, create a pull request on the WPT github:
>+	https://github.com/web-platform-tests/wpt
>+
>+Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
>+
>+Do NOT modify or remove this file.
>+
>+------------------------------------------------------------------------
>+Properties requiring vendor prefixes:
>+None
>+Property values requiring vendor prefixes:
>+None
>+------------------------------------------------------------------------
>+List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-frame-element/document-getters-return-null-for-cross-origin.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/content_document_changes_only_after_load_matures.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/content_document_changes_only_after_load_matures.html
>index 2cb85700230..b657f26158a 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/content_document_changes_only_after_load_matures.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/content_document_changes_only_after_load_matures.html
>@@ -8,13 +8,20 @@
> async_test(function(t) {
>     var iframe = document.createElement("iframe");
>     document.body.appendChild(iframe);
>-    iframe.onload = t.step_func(function() {
>-        assert_true(iframe.contentDocument.location.toString().includes("support/blank.htm"));
>-        t.done();
>+    var checkedDuringParse = false;
>+    iframe.onload = t.step_func_done(function() {
>+        testContentDocument();
>+        assert_true(checkedDuringParse);
>+    });
>+
>+    let url = "support/iframe-that-checks-contentDocument.html";
>+    window.testContentDocument = t.step_func(function() {
>+        assert_true(iframe.contentDocument.location.toString().includes(url));
>+        checkedDuringParse = true;
>     });
> 
>     assert_equals(iframe.contentDocument.location.toString(), "about:blank");
>-    iframe.src = "support/blank.htm?pipe=trickle(d2)";
>+    iframe.src = url + "?pipe=trickle(d2)";
>     // The location of the contentDocument should not change until the new document has matured.
>     assert_equals(iframe.contentDocument.location.toString(), "about:blank");
> }, "contentDocument should only change after a load matures.");
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/cross_origin_parentage.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/cross_origin_parentage.sub.html
>similarity index 80%
>rename from LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/cross_origin_parentage.html
>rename to LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/cross_origin_parentage.sub.html
>index cd27b8ea79c..128892d7ed0 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/cross_origin_parentage.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/cross_origin_parentage.sub.html
>@@ -5,7 +5,7 @@
> <script src="/resources/testharnessreport.js"></script>
> <script src="iframe_harness.js"></script>
> <body>
>-  <iframe src="http://www1.web-platform.test:8000/html/semantics/embedded-content/the-iframe-element/cross_origin_child.html"></iframe>
>+  <iframe src="http://{{domains[www1]}}:{{ports[http][0]}}/html/semantics/embedded-content/the-iframe-element/cross_origin_child.html"></iframe>
> </body>
> <script>
>     get_test_results('bffa23ee-b45a-4e9a-9405-87ab437d5cfa');
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/document-getters-return-null-for-cross-origin.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/document-getters-return-null-for-cross-origin.html
>new file mode 100644
>index 00000000000..e3dc0b0e4e6
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/document-getters-return-null-for-cross-origin.html
>@@ -0,0 +1,17 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<title>Test that contentDocument/getSVGDocument() return null for a cross-origin document.</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<body>
>+<iframe src='data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><rect height="100" width="100"/></svg>'></iframe>
>+<script>
>+const iframe = document.querySelector('iframe');
>+var t1 = async_test('HTMLIFrameElement.contentDocument for cross-origin document');
>+window.addEventListener(
>+    'load', t1.step_func_done(() => { assert_equals(iframe.contentDocument, null); }));
>+var t2 = async_test('HTMLIFrameElement.getSVGDocument() for cross-origin document');
>+window.addEventListener(
>+    'load', t2.step_func_done(() => { assert_equals(iframe.getSVGDocument(), null); }));
>+</script>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allow.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allow.html
>new file mode 100644
>index 00000000000..9e673149238
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allow.html
>@@ -0,0 +1,66 @@
>+<!doctype html>
>+<meta charset=utf-8>
>+<title>Check processing of allow attribute in nested browsing context</title>
>+<link rel="author" title="Google" href="https://www.google.com">
>+<link rel="help" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#attr-iframe-allow">
>+<link rel="help" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#initialise-the-document-object">
>+<link rel="help" href="https://fullscreen.spec.whatwg.org/#fullscreen-enabled-flag">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+
>+<div id="log"></div>
>+<script>
>+  // This returns a data URL (cross-origin with the containing document) which
>+  // advances a counter, and reports the counter value together with the
>+  // document's fullscreenEnabled state, every time it receives a postMessage.
>+  // Fullscreen itself is not important for this test, but the flag is a useful
>+  // indicator of whether a policy-controlled-feature is allowed or denied.
>+  function getSourceForCrossOriginPage(initial_count) {
>+    var page_contents = "<html><body><script>var count="+initial_count+";window.addEventListener('message',function(){parent.postMessage({'count':count++,'fullscreenEnabled':document.fullscreenEnabled},'*');});</scr"+"ipt></body></html>";
>+    return "data:text/html;base64,"+btoa(page_contents);
>+  }
>+
>+  async_test(function(t) {
>+    var iframe = document.createElement("iframe");
>+    iframe.src = getSourceForCrossOriginPage(0);
>+
>+    iframe.addEventListener('load', function() {
>+      // Request the fullscreenEnabled state whenever the frame loads
>+      iframe.contentWindow.postMessage(true,"*");
>+    });
>+
>+    window.addEventListener('message', this.step_func(function(msg) {
>+      if (msg.data.count == 0) {
>+        assert_false(msg.data.fullscreenEnabled, "Document inside cross-origin iframe without allow attribute should not have feature enabled");
>+        iframe.setAttribute("allow", "fullscreen");
>+        iframe.contentWindow.postMessage(true,"*"); // Request state again
>+      } else if (msg.data.count == 1) {
>+        assert_false(msg.data.fullscreenEnabled, "Feature should be denied when correct allow attribute is added, before reload");
>+        iframe.src = getSourceForCrossOriginPage(2); // Reload the frame
>+      } else if (msg.data.count == 2) {
>+        assert_true(msg.data.fullscreenEnabled, "Feature should be allowed when correct allow attribute is added, after reload");
>+        iframe.removeAttribute("allow");
>+        iframe.contentWindow.postMessage(true,"*"); // Request state again
>+      } else if (msg.data.count == 3) {
>+        assert_true(msg.data.fullscreenEnabled, "Feature should be allowed when allow attribute is removed, before reload");
>+        iframe.src = getSourceForCrossOriginPage(4); // Reload the frame
>+      } else if (msg.data.count == 4) {
>+        assert_false(msg.data.fullscreenEnabled, "Feature should be denied when allow attribute is removed, after reload");
>+        iframe.setAttribute("allow", "payment");  // Set allow to an unrelated feature
>+        iframe.src = getSourceForCrossOriginPage(5); // Reload the frame
>+      } else if (msg.data.count == 5) {
>+        assert_false(msg.data.fullscreenEnabled, "Feature should be denied with incorrect allow attribute");
>+        iframe.setAttribute("allow", "payment;fullscreen");  // Include fullscreen again
>+        iframe.src = getSourceForCrossOriginPage(6); // Reload the frame
>+      } else if (msg.data.count == 6) {
>+        assert_true(msg.data.fullscreenEnabled, "Feature should be allowed with complex allow attribute");
>+        t.done();
>+      } else {
>+        assert_unreached();
>+      }
>+    }));
>+
>+    document.body.appendChild(iframe);
>+  }, "iframe-cross-origin-allow");
>+
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allowfullscreen.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allowfullscreen.html
>index da5791a2de9..9fc285bf3e1 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allowfullscreen.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allowfullscreen.html
>@@ -3,13 +3,21 @@
> <title>Check how allowfullscreen affects fullscreen enabled flag</title>
> <link rel="author" title="Xidorn Quan" href="https://www.upsuper.org">
> <link rel="author" title="Mozilla" href="https://www.mozilla.org">
>-<link rel="help" href="https://html.spec.whatwg.org/multipage/browsers.html#initialise-the-document-object">
>+<link rel="help" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#initialise-the-document-object">
> <link rel="help" href="https://fullscreen.spec.whatwg.org/#fullscreen-enabled-flag">
> <script src="/resources/testharness.js"></script>
> <script src="/resources/testharnessreport.js"></script>
> 
> <div id="log"></div>
> <script>
>+  // This returns a data URL (cross-origin with the containing document) which
>+  // advances a counter, and reports the counter value together with the
>+  // document's fullscreenEnabled state, every time it receives a postMessage.
>+  function getSourceForCrossOriginPage(initial_count) {
>+    var page_contents = "<html><body><script>var count="+initial_count+";window.addEventListener('message',function(){parent.postMessage({'count':count++,'fullscreenEnabled':document.fullscreenEnabled},'*');});</scr"+"ipt></body></html>";
>+    return "data:text/html;base64,"+btoa(page_contents);
>+  }
>+
>   async_test(function(t) {
>     var iframe = document.createElement("iframe");
>     iframe.src = "support/blank.htm";
>@@ -21,13 +29,45 @@
> 
>     assert_true(document.fullscreenEnabled, "Top level document has fullscreen enabled flag set");
>     eventWatcher.wait_for("load").then(t.step_func_done(function() {
>-      assert_false(iframe.contentDocument.fullscreenEnabled, "Document inside iframe without allowfullscreen attribute should not have fullscreen enabled flag set");
>-      iframe.setAttribute("allowfullscreen", true);
>-      assert_true(iframe.contentDocument.fullscreenEnabled, "Fullscreen should be allowed when allowfullscreen attribute is set");
>-      iframe.removeAttribute("allowfullscreen");
>-      assert_false(iframe.contentDocument.fullscreenEnabled, "Fullscreen should be denied when allowfullscreen attribute is removed");
>+      assert_true(iframe.contentDocument.fullscreenEnabled, "Document inside same-origin iframe without allowfullscreen attribute should still have fullscreen enabled flag set");
>     }));
>-  }, "iframe-allowfullscreen");
>+  }, "iframe-same-origin-allowfullscreen");
>+
>+  async_test(function(t) {
>+    var iframe = document.createElement("iframe");
>+    iframe.src = getSourceForCrossOriginPage(0);
>+
>+    iframe.addEventListener('load', function() {
>+      // Request the fullscreenEnabled state whenever the frame loads
>+      iframe.contentWindow.postMessage(true,"*");
>+    });
>+
>+    window.addEventListener('message', this.step_func(function(msg) {
>+      if (msg.data.count == 0) {
>+        assert_false(msg.data.fullscreenEnabled, "Document inside cross-origin iframe without allowfullscreen attribute should not have fullscreen enabled flag set");
>+        iframe.setAttribute("allowfullscreen", "");
>+        iframe.contentWindow.postMessage(true,"*"); // Request state again
>+      } else if (msg.data.count == 1) {
>+        assert_false(msg.data.fullscreenEnabled, "Fullscreen should be denied when allowfullscreen attribute is added, before reload");
>+        iframe.src = getSourceForCrossOriginPage(2); // Reload the frame
>+      } else if (msg.data.count == 2) {
>+        assert_true(msg.data.fullscreenEnabled, "Fullscreen should be allowed when allowfullscreen attribute is added, after reload");
>+        iframe.removeAttribute("allowfullscreen");
>+        iframe.contentWindow.postMessage(true,"*"); // Request state again
>+      } else if (msg.data.count == 3) {
>+        assert_true(msg.data.fullscreenEnabled, "Fullscreen should be allowed when allowfullscreen attribute is removed, before reload");
>+        iframe.src = getSourceForCrossOriginPage(4); // Reload the frame
>+      } else if (msg.data.count == 4) {
>+        assert_false(msg.data.fullscreenEnabled, "Fullscreen should be denied when allowfullscreen attribute is removed, after reload");
>+        t.done();
>+      }
>+    }));
>+
>+    document.body.appendChild(iframe);
>+    t.add_cleanup(function() {
>+      document.body.removeChild(iframe);
>+    });
>+  }, "iframe-cross-origin-allowfullscreen");
> 
>   /* Fullscreen enabled flag with about:blank */
> 
>@@ -41,7 +81,7 @@
> 
>   test(function() {
>     test_allowfullscreen_noload(function() {}, function(doc) {
>-      assert_false(doc.fullscreenEnabled, "Fullscreen should not be enabled without allowfullscreen attribute");
>+      assert_true(doc.fullscreenEnabled, "Fullscreen should still be enabled in same-origin document without allowfullscreen attribute");
>     });
>   }, "iframe-noload-noallowfullscreen");
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-nosrc.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-nosrc.html
>new file mode 100644
>index 00000000000..57189a0b884
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-nosrc.html
>@@ -0,0 +1,26 @@
>+<!DOCTYPE html>
>+<meta charset="UTF-8">
>+<title>Check processing of iframe without src and srcdoc attribute</title>
>+<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org">
>+<link rel="author" title="Mozilla" href="https://www.mozilla.org">
>+<link rel="help" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#process-the-iframe-attributes">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+
>+<div id="log"></div>
>+<iframe></iframe>
>+<script>
>+  let iframe = document.querySelector("iframe");
>+
>+  async_test(t => {
>+    let originDoc = iframe.contentDocument;
>+    window.addEventListener("load", t.step_func_done(() => {
>+      assert_equals(iframe.contentDocument, originDoc, "contentDocument shouldn't be changed");
>+    }));
>+  }, "iframe.contentDocument should not be changed");
>+
>+  async_test(t => {
>+    iframe.addEventListener("load", t.unreached_func());
>+    window.addEventListener("load", () => t.done());
>+  }, "load event of iframe should not be fired after processing the element");
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_javascript_url_01.htm b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_javascript_url_01.htm
>index d6c2abe7d57..fd65f932982 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_javascript_url_01.htm
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_javascript_url_01.htm
>@@ -18,7 +18,8 @@ var expected = {
>     ifr1:{url:"about:blank", sameDom: true},
>     ifr2:{url:"about:blank", sameDom: true},
>     ifr3:{url: location.href.replace(/\/[^\/]*$/, '/'), sameDom: true },
>-    ifr4:{url:"about:blank", sameDom: true}
>+    ifr4:{url:"about:blank", sameDom: true},
>+    ifr5:{url:"about:blank", sameDom: true}
> }
> 
> var js_url = 'javascript:"<html><script>var sameDom = false; try{var cn = top.document.body.className;sameDom = true;}catch(e){}; parent.postMessage( {url: document.URL, name: name, sameDom: sameDom}, \'*\')<\/script><body><p>JS-generated document</p></body></<html>";'
>@@ -46,8 +47,15 @@ window.onload = function () {
>             results[frame.name] = 'Exception on setting!';
>         }
>     };
>+
>+    // An iframe with an initial src of a javascript: URL should also have a
>+    // document URL of about:blank.
>+    var ifr = document.createElement('iframe');
>+    ifr.name = 'ifr5';
>+    ifr.src = js_url;
>+    document.body.appendChild(ifr);
> }
> 
> </script>
> </body>
>-</html>
>\ No newline at end of file
>+</html>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_remove_src.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_remove_src.html
>new file mode 100644
>index 00000000000..f0ff9ff5082
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_remove_src.html
>@@ -0,0 +1,40 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<title>Test that removing the src attribute of an iframe loads about:blank
>+  instead of whatever was loaded previously.</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<body>
>+  <script>
>+    var iframe;
>+    var t = async_test();
>+    t.step(setupFrame);
>+
>+    function setupFrame() {
>+      iframe = document.createElement("iframe");
>+      iframe.src = URL.createObjectURL(new Blob(["text"], { type: "text/html" }));
>+      iframe.onload = t.step_func(blobLoaded);
>+      document.body.appendChild(iframe);
>+    }
>+
>+    var removalRunning = false;
>+    function blobLoaded() {
>+      assert_equals(iframe.contentDocument.location.protocol, "blob:",
>+                    "Should have loaded the blob");
>+      assert_equals(iframe.contentDocument.documentElement.textContent, "text",
>+                    "Should have loaded the blob text");
>+      iframe.onload = t.step_func_done(aboutBlankLoaded);
>+      removalRunning = true;
>+      iframe.removeAttribute("src");
>+      removalRunning = false;
>+    }
>+
>+    function aboutBlankLoaded() {
>+      assert_false(removalRunning, "Should not have loaded about:blank sync");
>+      assert_equals(iframe.contentDocument.location.href, "about:blank",
>+                    "Should have loaded about:blank");
>+      assert_equals(iframe.contentDocument.documentElement.textContent, "",
>+                    "Should have loaded the about:blank text");
>+    }
>+  </script>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-1.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-1.html
>index b0875ec6b91..feb876608ac 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-1.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-1.html
>@@ -10,25 +10,15 @@
>   <body>
>     <iframe sandbox="allow-top-navigation allow-scripts"></iframe>
>     <script>
>-      if (opener) {
>-        // We're the popup (i.e. a top frame).  Load into the iframe the page
>-        // trying to modifying the top frame and transmit the result to our
>-        // opener.
>-        onmessage = function(e) {
>-          opener.postMessage(e.data, "*")
>-        }
>-        document.querySelector("iframe").src = "support/iframe-that-performs-top-navigation-on-popup.html";
>-      } else {
>-        // We are the main test page.  Open ourselves as a popup, so that we can
>-        // can experiment navigation of the top frame.
>-        async_test(t => {
>-          window.addEventListener("message", t.step_func_done(e => {
>-            assert_equals(e.data, "can navigate");
>-            e.source.close();
>-          }));
>-          window.open(location.href);
>-        }, "Frames with `allow-top-navigation` should be able to navigate the top frame.");
>-      }
>+      // We are the main test page.  Open a popup, so that we can
>+      // can experiment navigation of the top frame.
>+      async_test(t => {
>+        window.addEventListener("message", t.step_func_done(e => {
>+          assert_equals(e.data, "can navigate");
>+          e.source.close();
>+        }));
>+        window.open("support/load-into-the-iframe.html");
>+      }, "Frames with `allow-top-navigation` should be able to navigate the top frame.");
>     </script>
>   </body>
> </html>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-2.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-2.html
>index 6113c6c3478..bd7d92c0ddc 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-2.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-2.html
>@@ -8,27 +8,16 @@
>     <script src="/resources/testharnessreport.js"></script>
>   </head>
>   <body>
>-    <iframe sandbox="allow-scripts"></iframe>
>     <script>
>-      if (opener) {
>-        // We're the popup (i.e. a top frame).  Load into the iframe the page
>-        // trying to modifying the top frame and transmit the result to our
>-        // opener.
>-        onmessage = function(e) {
>-          opener.postMessage(e.data, "*")
>-        }
>-        document.querySelector("iframe").src = "support/iframe-that-performs-top-navigation-on-popup.html";
>-      } else {
>-        // We are the main test page.  Open ourselves as a popup, so that we can
>-        // can experiment navigation of the top frame.
>-        async_test(t => {
>-          window.addEventListener("message", t.step_func_done(e => {
>-            assert_equals(e.data, "cannot navigate");
>-            e.source.close();
>-          }));
>-          window.open(location.href);
>-        }, "Frames without `allow-top-navigation` should not be able to navigate the top frame.");
>-      }
>+      // We are the main test page.  Open a popup, so that we can
>+      // can experiment navigation of the top frame.
>+      async_test(t => {
>+        window.addEventListener("message", t.step_func_done(e => {
>+          assert_equals(e.data, "cannot navigate");
>+          e.source.close();
>+        }));
>+        window.open('support/load-into-the-iframe.html');
>+      }, "Frames without `allow-top-navigation` should not be able to navigate the top frame.");
>     </script>
>   </body>
> </html>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-3.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-3.html
>index 9de5d53466e..c7c56d670e5 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-3.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-3.html
>@@ -14,25 +14,15 @@
>          error: allow-top-navigation-by-user-activation will have no effect. -->
>     <iframe sandbox="allow-top-navigation allow-top-navigation-by-user-activation allow-scripts"></iframe>
>     <script>
>-      if (opener) {
>-        // We're the popup (i.e. a top frame).  Load into the iframe the page
>-        // trying to modifying the top frame and transmit the result to our
>-        // opener.
>-        onmessage = function(e) {
>-          opener.postMessage(e.data, "*")
>-        }
>-        document.querySelector("iframe").src = "support/iframe-that-performs-top-navigation-on-popup.html";
>-      } else {
>-        // We are the main test page.  Open ourselves as a popup, so that we can
>-        // can experiment navigation of the top frame.
>-        async_test(t => {
>-          window.addEventListener("message", t.step_func_done(e => {
>-            assert_equals(e.data, "can navigate");
>-            e.source.close();
>-          }));
>-          window.open(location.href);
>-        }, "Frames with `allow-top-navigation` should be able to navigate the top frame even when `allow-top-navigation-by-user-activation` is set.");
>-      }
>+      // We are the main test page.  Open a popup, so that we can
>+      // can experiment navigation of the top frame.
>+      async_test(t => {
>+        window.addEventListener("message", t.step_func_done(e => {
>+          assert_equals(e.data, "can navigate");
>+          e.source.close();
>+        }));
>+        window.open("support/load-into-the-iframe.html");
>+      }, "Frames with `allow-top-navigation` should be able to navigate the top frame even when `allow-top-navigation-by-user-activation` is set.");
>     </script>
>   </body>
> </html>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/src-repeated-in-ancestor.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/src-repeated-in-ancestor.html
>new file mode 100644
>index 00000000000..2f77dfe164d
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/src-repeated-in-ancestor.html
>@@ -0,0 +1,138 @@
>+<!doctype html>
>+<meta charset="utf-8">
>+<title>Navigation should not occur when `src` matches the location of a anscestor browsing context</title>
>+<script>
>+// Avoid recursion in non-conforming browsers
>+if (parent !== window && parent.title == window.title) {
>+  window.stop();
>+}
>+</script>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<body>
>+<script>
>+/**
>+ * This test uses the `beforeunload` event to detect navigation. Because that
>+ * event is fired synchronously in response to "process the iframe attributes",
>+ * a second "control" iframe may be used to verify cases where navigation
>+ * should *not* occur. `Promise.race` ensures that tests complete as soon as
>+ * possible.
>+ *
>+ * Although the specification dictates that the `beforeunload` event must be
>+ * emitted synchronously during navigation, a number of user agents do not
>+ * adhere to this requirement. WPT includes a dedicated test for synchronous
>+ * emission of the event [1]. This test is authored to support non-standard
>+ * behavior in order to avoid spuriously passing in those UAs.
>+ *
>+ * [1] https://github.com/web-platform-tests/wpt/pull/12343
>+ */
>+'use strict';
>+
>+function when(target, eventName) {
>+  return new Promise(function(resolve, reject) {
>+    target.addEventListener(eventName, function() {
>+      resolve();
>+    }, { once: true });
>+    target.addEventListener('error', function() {
>+      reject(new Error('Error while waiting for ' + eventName));
>+    }, { once: true });
>+  });
>+}
>+
>+function init(doc, t) {
>+  var iframes = [doc.createElement('iframe'), doc.createElement('iframe')];
>+
>+  iframes.forEach(function(iframe) {
>+    iframe.src = '/common/blank.html';
>+    doc.body.appendChild(iframe);
>+
>+    t.add_cleanup(function() {
>+      iframe.parentNode.removeChild(iframe);
>+    });
>+  });
>+
>+  return Promise.all([when(iframes[0], 'load'), when(iframes[1], 'load')])
>+    .then(function() { return iframes; });
>+}
>+
>+// This test verifies that navigation does occur; it is intended to validate
>+// the utility functions.
>+promise_test(function(t) {
>+  return init(document, t)
>+    .then(function(iframes) {
>+      var subjectNavigation = when(iframes[0].contentWindow, 'beforeunload');
>+      var controlNavigation = when(iframes[1].contentWindow, 'beforeunload');
>+
>+      iframes[0].src = '/common/blank.html?2';
>+      iframes[1].src = '/common/blank.html?3';
>+
>+      return Promise.all([subjectNavigation, controlNavigation]);
>+    });
>+}, 'different path name');
>+
>+promise_test(function(t) {
>+  return init(document, t)
>+    .then(function(iframes) {
>+      var subjectNavigation = when(iframes[0].contentWindow, 'beforeunload');
>+      var controlNavigation = when(iframes[1].contentWindow, 'beforeunload');
>+
>+      iframes[0].src = location.href;
>+      iframes[1].src = '/common/blank.html?4';
>+
>+      return Promise.race([
>+        subjectNavigation.then(function() {
>+          assert_unreached('Should not navigate');
>+        }),
>+        controlNavigation
>+      ]);
>+    });
>+}, 'same path name, no document fragment');
>+
>+promise_test(function(t) {
>+  return init(document, t)
>+    .then(function(iframes) {
>+      var subjectNavigation = when(iframes[0].contentWindow, 'beforeunload');
>+      var controlNavigation = when(iframes[1].contentWindow, 'beforeunload');
>+
>+      iframes[0].src = location.href + '#something-else';
>+      iframes[1].src = '/common/blank.html?5';
>+
>+      return Promise.race([
>+        subjectNavigation.then(function() {
>+          assert_unreached('Should not navigate');
>+        }),
>+        controlNavigation
>+      ]);
>+    });
>+}, 'same path name, different document fragment');
>+
>+promise_test(function(t) {
>+  var intermediate = document.createElement('iframe');
>+
>+  document.body.appendChild(intermediate);
>+
>+  t.add_cleanup(function() {
>+    intermediate.parentNode.removeChild(intermediate);
>+  });
>+  intermediate.contentDocument.open();
>+  intermediate.contentDocument.write('<body></body>');
>+  intermediate.contentDocument.close();
>+
>+  return init(intermediate.contentDocument, t)
>+    .then(function(iframes) {
>+      var subjectNavigation = when(iframes[0].contentWindow, 'beforeunload');
>+      var controlNavigation = when(iframes[1].contentWindow, 'beforeunload');
>+
>+      iframes[0].src = location.href;
>+      iframes[1].src = '/common/blank.html?6';
>+
>+      return Promise.race([
>+        subjectNavigation.then(function() {
>+          assert_unreached('Should not navigate');
>+        }),
>+        controlNavigation
>+      ]);
>+    });
>+}, 'same path name, no document fragement (intermediary browsing context)');
>+</script>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-checks-contentDocument.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-checks-contentDocument.html
>new file mode 100644
>index 00000000000..bc35a977e8b
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-checks-contentDocument.html
>@@ -0,0 +1,3 @@
>+<script>
>+  parent.testContentDocument();
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/load-into-the-iframe.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/load-into-the-iframe.html
>new file mode 100644
>index 00000000000..05a80be7374
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/load-into-the-iframe.html
>@@ -0,0 +1,19 @@
>+
>+<!DOCTYPE html>
>+<html>
>+  <head>
>+    <meta charset="utf-8">
>+  </head>
>+  <body>
>+    <iframe sandbox="allow-scripts"></iframe>
>+    <script>
>+      // We're the popup (i.e. a top frame).  Load into the iframe the page
>+      // trying to modifying the top frame and transmit the result to our
>+      // opener.
>+      onmessage = function(e) {
>+        opener.postMessage(e.data, "*")
>+      }
>+      document.querySelector("iframe").src = "iframe-that-performs-top-navigation-on-popup.html";
>+    </script>
>+  </body>
>+</html>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/w3c-import.log
>index a4fe121fc55..68bbb2fb0db 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>@@ -15,6 +15,7 @@ None
> ------------------------------------------------------------------------
> List of files:
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/blank.htm
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-checks-contentDocument.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-opens-modals.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-performs-top-navigation-on-popup.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe-that-performs-top-navigation-without-user-gesture-failed.html
>@@ -46,6 +47,7 @@ List of files:
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe_sandbox_031.htm
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe_sandbox_032.htm
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/iframe_sandbox_block_modals.js
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/load-into-the-iframe.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/navigation-changed-iframe.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/sandbox.pdf
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/support/sandbox_allow_script.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/w3c-import.log
>index f18ded2d724..bcd81314bcd 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>@@ -20,16 +20,20 @@ List of files:
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/content_document_changes_only_after_load_matures.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/cross_origin_child.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/cross_origin_grandchild.html
>-/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/cross_origin_parentage.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/cross_origin_parentage.sub.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/document-getters-return-null-for-cross-origin.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/historical.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allow.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allowfullscreen.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-append-to-child-document.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-load-event.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-nosrc.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-synchronously-discard.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-with-base-expected.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-with-base.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_harness.js
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_javascript_url_01.htm
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_remove_src.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_script.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-1.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_allow_top_navigation-2.html
>@@ -82,4 +86,5 @@ List of files:
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/sandbox_030.htm
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/sandbox_031.htm
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/sandbox_032.htm
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/src-repeated-in-ancestor.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/stash.py
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/404-response-with-actual-image-data.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/404-response-with-actual-image-data.html
>new file mode 100644
>index 00000000000..73b937f67fd
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/404-response-with-actual-image-data.html
>@@ -0,0 +1,18 @@
>+<!DOCTYPE HTML>
>+<meta charset="utf-8">
>+<title>404 response with actual image data should be rendered and load event is fired</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+
>+<img id="img">
>+
>+<script>
>+  async_test(t => {
>+    var img = document.getElementById("img");
>+    img.onload = t.step_func_done(e => {
>+      assert_equals(e.type, "load", "image.onload() called");
>+    });
>+    img.onerror = t.unreached_func("image.onerror() was not supposed to be called");
>+    img.src = "404-response-with-actual-image-data.py";
>+  }, "404 response with actual image data should be rendered and load event is fired");
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/404-response-with-actual-image-data.py b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/404-response-with-actual-image-data.py
>new file mode 100644
>index 00000000000..e4216c6d53f
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/404-response-with-actual-image-data.py
>@@ -0,0 +1,3 @@
>+import base64
>+def main(req, res):
>+    return 404, [('Content-Type', 'image/png')], base64.decodestring("iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAAhSURBVDhPY3wro/KfgQLABKXJBqMGjBoAAqMGDLwBDAwAEsoCTFWunmQAAAAASUVORK5CYII=")
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/Image-constructor.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/Image-constructor.html
>index aa838ec8774..38b6765bb49 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/Image-constructor.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/Image-constructor.html
>@@ -32,6 +32,11 @@
>       assert_equals(Image.prototype, HTMLImageElement.prototype, "Image.prototype is same as HTMLImageElement.prototype");
>       assert_equals(new Image().__proto__, HTMLImageElement.prototype, "Image __proto__ is HTMLImageElement prototype ");
>       assert_equals(Image.prototype.__proto__, HTMLElement.prototype, "Image.prototype __proto__ is HTMLElement prototype");
>+
>+      const desc = Object.getOwnPropertyDescriptor(Image, "prototype");
>+      assert_false(desc.configurable, "Image.prototype is not configurable");
>+      assert_false(desc.enumerable, "Image.prototype is not enumerable");
>+      assert_false(desc.writable, "Image.prototype is not writable");
>   }, "NamedConstructor creates the correct object structure.");
> 
> </script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images-expected.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images-expected.html
>new file mode 100644
>index 00000000000..8061abae508
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images-expected.html
>@@ -0,0 +1,2 @@
>+<!doctype html>
>+<img src="3.jpg">
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images-onload.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images-onload.html
>new file mode 100644
>index 00000000000..5fc5cb8b619
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images-onload.html
>@@ -0,0 +1,33 @@
>+<!doctype html>
>+<html>
>+<title>Ensure images from available images list can be drawn to a canvas</title>
>+<link rel="help" href="https://html.spec.whatwg.org/multipage/#the-list-of-available-images">
>+<meta charset="utf-8">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<div id="log"></div>
>+<script>
>+  async_test(function(t) {
>+    var i = new Image();
>+    i.onerror = t.unreached_func();
>+    i.onload = t.step_func(function() {
>+      var i2 = new Image();
>+      // Potentially start multiple image loading tasks by performing several
>+      // relevant mutations. This could lead to an invalid state later in an
>+      // erroneous implementation.
>+      i2.crossOrigin = true;
>+      // Start an image loading task that is expected to short-circuit since
>+      // the requested image is present in the list of available images.
>+      i2.src = "3.jpg";
>+      i2.onerror = t.unreached_func();
>+      // Ensure the loaded image is in a state that is usable by a 2d canvas.
>+      i2.onload = t.step_func_done(function() {
>+        var c = document.createElement('canvas');
>+        var ctx = c.getContext('2d');
>+        ctx.drawImage(i2, 0, 0);
>+      });
>+    });
>+    // Request an image which should be added to the list of available images.
>+    i.src = "3.jpg";
>+  });
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images.html
>new file mode 100644
>index 00000000000..779ff978689
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images.html
>@@ -0,0 +1,17 @@
>+<!doctype html>
>+<html class="reftest-wait">
>+<title>Ensure images from available images list are rendered</title>
>+<meta charset="utf-8">
>+<link rel="match" href="available-images-ref.html">
>+<link rel="help" href="https://html.spec.whatwg.org/multipage/#the-img-element">
>+<div id="log"></div>
>+<script>
>+  var i = new Image();
>+  i.onload = function() {
>+    var i2 = new Image();
>+    i2.src = "3.jpg";
>+    document.body.appendChild(i2);
>+    document.documentElement.classList.remove("reftest-wait");
>+  };
>+  i.src = "3.jpg";
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/current-pixel-density/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/current-pixel-density/w3c-import.log
>index 7347d6329a7..9e32235327e 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/current-pixel-density/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/current-pixel-density/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-iframe.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-iframe.html
>new file mode 100644
>index 00000000000..56060cb5d64
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-iframe.html
>@@ -0,0 +1,54 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<meta name="timeout" content="long">
>+<title>HTMLImageElement.prototype.decode(), iframe tests.</title>
>+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
>+<link rel=help href="https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-decode">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+
>+<iframe id="frame_loaded" srcdoc="iframe"></iframe>
>+<iframe id="frame_notloaded" srcdoc="iframe"></iframe>
>+<iframe id="frame_notloaded2" srcdoc="iframe"></iframe>
>+
>+<script>
>+"use strict";
>+
>+promise_test(function() {
>+  return new Promise(function(resolve, reject) {
>+    var frame = document.getElementById("frame_loaded");
>+    var img = frame.contentDocument.createElement("img");
>+    img.src = "/images/green.png";
>+    img.onload = function() {
>+      // At this point the frame which created the img is removed, so decode() should fail.
>+      frame.parentNode.removeChild(frame);
>+      img.decode().then(function() {
>+        assert_false(true, "Unexpected success");
>+      }, function() {
>+        resolve();
>+      });
>+    };
>+  });
>+}, document.title + " Decode from removed iframe fails (loaded img)");
>+
>+promise_test(function(t) {
>+  var frame = document.getElementById("frame_notloaded");
>+  var img = frame.contentDocument.createElement("img");
>+  img.src = "/images/green.png";
>+  frame.parentNode.removeChild(frame);
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Decode from removed iframe fails (img not loaded)");
>+
>+promise_test(function(t) {
>+  var frame = document.getElementById("frame_notloaded2");
>+  var img = frame.contentDocument.createElement("img");
>+  img.src = "/images/green.png";
>+  // First request a promise, then remove the iframe.
>+  var promise = img.decode();
>+  frame.parentNode.removeChild(frame);
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Decode from iframe, later removed, fails (img not loaded)");
>+
>+</script>
>+
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes-svg.tentative.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes-svg.tentative.html
>new file mode 100644
>index 00000000000..d8d55a81478
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes-svg.tentative.html
>@@ -0,0 +1,82 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<meta name="timeout" content="long">
>+<title>SVGImageElement.prototype.decode(), href mutation tests.</title>
>+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+
>+<script>
>+"use strict";
>+
>+// src tests
>+// -------------------
>+promise_test(function(t) {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "/images/green.png");
>+  var promise = img.decode();
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "/images/green.svg");
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " xlink:href changes fail decode.");
>+
>+promise_test(function(t) {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttribute('href', "/images/green.png");
>+  var promise = img.decode();
>+  img.setAttribute('href', "/images/green.svg");
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " href changes fail decode.");
>+
>+promise_test(function(t) {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "/images/green.png");
>+  var first_promise = img.decode();
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "/images/green.svg");
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    promise_rejects(t, "EncodingError", first_promise),
>+    second_promise
>+  ]);
>+}, document.title + " xlink:href changes fail decode; following good decode succeeds.");
>+
>+promise_test(function(t) {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttribute('href', "/images/green.png");
>+  var first_promise = img.decode();
>+  img.setAttribute('href', "/images/green.svg");
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    promise_rejects(t, "EncodingError", first_promise),
>+    second_promise
>+  ]);
>+}, document.title + " href changes fail decode; following good decode succeeds.");
>+
>+promise_test(function(t) {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "/images/green.png");
>+  var first_promise = img.decode();
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "/non/existent/path.png");
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    promise_rejects(t, "EncodingError", first_promise),
>+    promise_rejects(t, "EncodingError", second_promise)
>+  ]);
>+}, document.title + " xlink:href changes fail decode; following bad decode fails.");
>+
>+promise_test(function(t) {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttribute('href', "/images/green.png");
>+  var first_promise = img.decode();
>+  img.setAttribute('href', "/non/existent/path.png");
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    promise_rejects(t, "EncodingError", first_promise),
>+    promise_rejects(t, "EncodingError", second_promise)
>+  ]);
>+}, document.title + " href changes fail decode; following bad decode fails.");
>+
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes.html
>new file mode 100644
>index 00000000000..82f98549c63
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes.html
>@@ -0,0 +1,121 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<meta name="timeout" content="long">
>+<title>HTMLImageElement.prototype.decode(), src/srcset mutation tests.</title>
>+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
>+<link rel=help href="https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-decode">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+
>+<script>
>+"use strict";
>+
>+// src tests
>+// -------------------
>+promise_test(function(t) {
>+  var img = new Image();
>+  img.src = "/images/green.png";
>+  var promise = img.decode();
>+  img.src = "/images/green.svg";
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " src changes fail decode.");
>+
>+promise_test(function(t) {
>+  var img = new Image();
>+  img.src = "/images/green.png";
>+  var first_promise = img.decode();
>+  img.src = "/images/blue.png";
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    promise_rejects(t, "EncodingError", first_promise),
>+    second_promise
>+  ]);
>+}, document.title + " src changes fail decode; following good png decode succeeds.");
>+
>+promise_test(function(t) {
>+  var img = new Image();
>+  img.src = "/images/green.png";
>+  var first_promise = img.decode();
>+  img.src = "/images/green.svg";
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    promise_rejects(t, "EncodingError", first_promise),
>+    second_promise
>+  ]);
>+}, document.title + " src changes fail decode; following good svg decode succeeds.");
>+
>+promise_test(function(t) {
>+  var img = new Image();
>+  img.src = "/images/green.png";
>+  var first_promise = img.decode();
>+  img.src = "/non/existent/path.png";
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    promise_rejects(t, "EncodingError", first_promise),
>+    promise_rejects(t, "EncodingError", second_promise)
>+  ]);
>+}, document.title + " src changes fail decode; following bad decode fails.");
>+
>+promise_test(function(t) {
>+  return new Promise(function(resolve, reject) {
>+    var img = new Image();
>+    // We wait for an onload, since the "Updating the image data" spec states
>+    // that if a new microtask is scheduled, the old one is canceled so
>+    // without the onload, the first decode request would be requested when the
>+    // img.src is empty. With an onload, we ensure that the img.src is set and
>+    // the image exists before issuing the first decode, then we verify that the
>+    // src change to the same value does not prevent that request from
>+    // succeeding.
>+    img.onload = t.step_func(function() {
>+      img.onload = null;
>+
>+      var first_promise = img.decode();
>+      img.src = "/images/green.png";
>+      var second_promise = img.decode();
>+      assert_not_equals(first_promise, second_promise);
>+      resolve(Promise.all([first_promise, second_promise]));
>+    });
>+    img.src = "/images/green.png";
>+  });
>+}, document.title + " src changes to the same path succeed.");
>+
>+// srcset tests
>+// -------------------
>+promise_test(function(t) {
>+  var img = new Image();
>+  img.srcset = "/images/green.png 100w";
>+  var promise = img.decode();
>+  img.srcset = "/images/green.svg 100w";
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " srcset changes fail decode.");
>+
>+promise_test(function(t) {
>+  var img = new Image();
>+  img.srcset = "/images/green.png 100w";
>+  var first_promise = img.decode();
>+  img.srcset = "/images/green.svg 100w";
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    promise_rejects(t, "EncodingError", first_promise),
>+    second_promise
>+  ]);
>+}, document.title + " srcset changes fail decode; following good decode succeeds.");
>+
>+promise_test(function(t) {
>+  var img = new Image();
>+  img.srcset = "/images/green.png 100w";
>+  var first_promise = img.decode();
>+  img.srcset = "/non/existent/path.png 100w";
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    promise_rejects(t, "EncodingError", first_promise),
>+    promise_rejects(t, "EncodingError", second_promise)
>+  ]);
>+}, document.title + " srcset changes fail decode; following bad decode fails.");
>+
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-picture.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-picture.html
>new file mode 100644
>index 00000000000..e3195d9d04d
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-picture.html
>@@ -0,0 +1,133 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<meta name="timeout" content="long">
>+<title>HTMLImageElement.prototype.decode(), picture tests.</title>
>+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
>+<link rel=help href="https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-decode">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+
>+<picture>
>+<source srcset="/images/green.png">
>+<source srcset="/images/blue.png">
>+<img id="testimg">
>+</picture>
>+
>+<script>
>+"use strict";
>+
>+promise_test(function() {
>+  var picture = document.createElement("picture");
>+  var source = document.createElement("source");
>+  var img = document.createElement("img");
>+
>+  picture.appendChild(source);
>+  picture.appendChild(img);
>+
>+  source.srcset = "/images/green.png";
>+
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with PNG source decodes with undefined.");
>+
>+promise_test(function() {
>+  var img = document.getElementById("testimg");
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with multiple sources decodes with undefined.");
>+
>+promise_test(function() {
>+  var picture = document.createElement("picture");
>+  var source = document.createElement("source");
>+  var img = document.createElement("img");
>+
>+  picture.appendChild(source);
>+  picture.appendChild(img);
>+
>+  source.srcset = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIA" +
>+                  "AAD91JpzAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH4QUSEioKsy" +
>+                  "AgywAAABl0RVh0Q29tbWVudABDcmVhdGVkIHdpdGggR0lNUFeBDhcAAAAW" +
>+                  "SURBVAjXY9y3bx8DAwPL58+fGRgYACktBRltLfebAAAAAElFTkSuQmCC";
>+
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with PNG data URL source decodes with undefined.");
>+
>+promise_test(function() {
>+  var picture = document.createElement("picture");
>+  var source = document.createElement("source");
>+  var img = document.createElement("img");
>+
>+  picture.appendChild(source);
>+  picture.appendChild(img);
>+
>+  source.srcset = "/images/green.svg";
>+
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with SVG source decodes with undefined.");
>+
>+promise_test(function(t) {
>+  var picture = document.createElement("picture");
>+  var source = document.createElement("source");
>+  var img = document.createElement("img");
>+
>+  picture.appendChild(source);
>+  picture.appendChild(img);
>+
>+  source.srcset = "/non/existent/path.png";
>+
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Non-existent source fails decode.");
>+
>+promise_test(function(t) {
>+  var picture = document.createElement("picture");
>+  var source = document.createElement("source");
>+  var img = document.createElement("img");
>+
>+  picture.appendChild(source);
>+  picture.appendChild(img);
>+
>+  source.srcset = "data:image/png;base64,iVBO00PDR0BADBEEF00KGg";
>+
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Corrupt image in src fails decode.");
>+
>+promise_test(function(t) {
>+  var picture = document.createElement("picture");
>+  var source = document.createElement("source");
>+  var img = document.createElement("img");
>+
>+  picture.appendChild(source);
>+  picture.appendChild(img);
>+
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Image without srcset fails decode.");
>+
>+promise_test(function() {
>+  var picture = document.createElement("picture");
>+  var source = document.createElement("source");
>+  var img = document.createElement("img");
>+
>+  picture.appendChild(source);
>+  picture.appendChild(img);
>+
>+  source.srcset = "/images/green.png";
>+
>+  var first_promise = img.decode();
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    first_promise,
>+    second_promise
>+  ]);
>+}, document.title + " Multiple decodes for images with src succeed.");
>+
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-svg.tentative.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-svg.tentative.html
>new file mode 100644
>index 00000000000..633b6a87d9d
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-svg.tentative.html
>@@ -0,0 +1,128 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<meta name="timeout" content="long">
>+<title>SVGImageElement.prototype.decode(), basic tests.</title>
>+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+
>+<script>
>+"use strict";
>+
>+// src tests
>+// -------------------
>+promise_test(function() {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "/images/green.png");
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with PNG xlink:href decodes with undefined.");
>+
>+promise_test(function() {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttribute('href', "/images/green.png");
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with PNG href decodes with undefined.");
>+
>+promise_test(function() {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href',
>+    "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAA" +
>+    "D91JpzAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH4QUSEioKsyAgyw" +
>+    "AAABl0RVh0Q29tbWVudABDcmVhdGVkIHdpdGggR0lNUFeBDhcAAAAWSURBVA" +
>+    "jXY9y3bx8DAwPL58+fGRgYACktBRltLfebAAAAAElFTkSuQmCC");
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with PNG data URL xlink:href decodes with undefined.");
>+
>+promise_test(function() {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttribute('href',
>+    "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAA" +
>+    "D91JpzAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH4QUSEioKsyAgyw" +
>+    "AAABl0RVh0Q29tbWVudABDcmVhdGVkIHdpdGggR0lNUFeBDhcAAAAWSURBVA" +
>+    "jXY9y3bx8DAwPL58+fGRgYACktBRltLfebAAAAAElFTkSuQmCC");
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with PNG data URL href decodes with undefined.");
>+
>+promise_test(function() {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "/images/green.svg");
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with SVG xlink:href decodes with undefined.");
>+
>+promise_test(function() {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttribute('href', "/images/green.svg");
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with SVG href decodes with undefined.");
>+
>+promise_test(function(t) {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "/non/existent/path.png");
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Non-existent xlink:href fails decode.");
>+
>+promise_test(function(t) {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttribute('href', "/non/existent/path.png");
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Non-existent href fails decode.");
>+
>+promise_test(function(t) {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "data:image/png;base64,iVBO00PDR0BADBEEF00KGg");
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Corrupt image in xlink:href fails decode.");
>+
>+promise_test(function(t) {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttribute('href', "data:image/png;base64,iVBO00PDR0BADBEEF00KGg");
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Corrupt image in href fails decode.");
>+
>+promise_test(function(t) {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Image without xlink:href or href fails decode.");
>+
>+promise_test(function() {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "/images/green.png");
>+  var first_promise = img.decode();
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    first_promise,
>+    second_promise
>+  ]);
>+}, document.title + " Multiple decodes with a xlink:href succeed.");
>+
>+promise_test(function() {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttribute('href', "/images/green.png");
>+  var first_promise = img.decode();
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    first_promise,
>+    second_promise
>+  ]);
>+}, document.title + " Multiple decodes with a href succeed.");
>+
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach-svg.tentative.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach-svg.tentative.html
>new file mode 100644
>index 00000000000..0fc49e60360
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach-svg.tentative.html
>@@ -0,0 +1,23 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<meta name="timeout" content="long">
>+<title>SVGImageElement.prototype.decode(), attach to DOM before promise resolves.</title>
>+<link rel=help href="https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-decode">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<svg></svg>
>+<script>
>+"use strict";
>+
>+promise_test(function() {
>+  var img = document.createElementNS('http://www.w3.org/2000/svg', 'image');
>+  img.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', "/images/green.png");
>+  const promise = img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+  // Don't wait for the promise to resolve before attaching the image.
>+  // The promise should still resolve successfully.
>+  document.querySelector('svg').appendChild(img);
>+  return promise;
>+}, document.title);
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach.html
>new file mode 100644
>index 00000000000..be680da619e
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach.html
>@@ -0,0 +1,26 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<meta name="timeout" content="long">
>+<title>HTMLImageElement.prototype.decode(), attach to DOM before promise resolves.</title>
>+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
>+<link rel=help href="https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-decode">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+
>+<body></body>
>+
>+<script>
>+"use strict";
>+
>+promise_test(function() {
>+  const img = new Image();
>+  img.src = "/images/green.png";
>+  const promise = img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+  // Don't wait for the promise to resolve before attaching the image.
>+  // The promise should still resolve successfully.
>+  document.body.appendChild(img);
>+  return promise;
>+}, document.title);
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode.html
>new file mode 100644
>index 00000000000..a296775c10d
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode.html
>@@ -0,0 +1,138 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<meta name="timeout" content="long">
>+<title>HTMLImageElement.prototype.decode(), basic tests.</title>
>+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
>+<link rel=help href="https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-decode">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+
>+<script>
>+"use strict";
>+
>+// src tests
>+// -------------------
>+promise_test(function() {
>+  var img = new Image();
>+  img.src = "/images/green.png";
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with PNG src decodes with undefined.");
>+
>+promise_test(function() {
>+  var img = new Image();
>+  img.src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAA" +
>+            "D91JpzAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH4QUSEioKsyAgyw" +
>+            "AAABl0RVh0Q29tbWVudABDcmVhdGVkIHdpdGggR0lNUFeBDhcAAAAWSURBVA" +
>+            "jXY9y3bx8DAwPL58+fGRgYACktBRltLfebAAAAAElFTkSuQmCC";
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with PNG data URL src decodes with undefined.");
>+
>+promise_test(function() {
>+  var img = new Image();
>+  img.src = "/images/green.svg";
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with SVG src decodes with undefined.");
>+
>+promise_test(function(t) {
>+  var img = new Image();
>+  img.src = "/non/existent/path.png";
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Non-existent src fails decode.");
>+
>+promise_test(function(t) {
>+  var inactive_doc = document.implementation.createHTMLDocument();
>+  var img = inactive_doc.createElement("img");
>+  img.src = "/images/green.png";
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Inactive document fails decode.");
>+
>+promise_test(function(t) {
>+  var inactive_doc = document.implementation.createHTMLDocument();
>+  var img = document.createElement("img");
>+  img.src = "/images/green.png";
>+  var promise = img.decode();
>+  inactive_doc.body.appendChild(img);
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Adopted active image into inactive document fails decode.");
>+
>+promise_test(function() {
>+  var inactive_doc = document.implementation.createHTMLDocument();
>+  var img = inactive_doc.createElement("img");
>+  img.src = "/images/green.png";
>+  document.body.appendChild(img);
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Adopted inactive image into active document succeeds.");
>+
>+promise_test(function(t) {
>+  var img = new Image();
>+  img.src = "data:image/png;base64,iVBO00PDR0BADBEEF00KGg";
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Corrupt image in src fails decode.");
>+
>+promise_test(function(t) {
>+  var img = new Image();
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Image without src/srcset fails decode.");
>+
>+promise_test(function() {
>+  var img = new Image();
>+  img.src = "/images/green.png";
>+  var first_promise = img.decode();
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    first_promise,
>+    second_promise
>+  ]);
>+}, document.title + " Multiple decodes for images with src succeed.");
>+
>+// srcset tests
>+// -------------------
>+promise_test(function() {
>+  var img = new Image();
>+  img.srcset = "/images/green.png 100w";
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with PNG srcset decodes with undefined.");
>+
>+promise_test(function() {
>+  var img = new Image();
>+  img.srcset = "/images/green.svg 100w";
>+  return img.decode().then(function(arg) {
>+    assert_equals(arg, undefined);
>+  });
>+}, document.title + " Image with SVG srcset decodes with undefined.");
>+
>+promise_test(function(t) {
>+  var img = new Image();
>+  img.srcset = "/non/existent/path.png 100w";
>+  var promise = img.decode();
>+  return promise_rejects(t, "EncodingError", promise);
>+}, document.title + " Non-existent srcset fails decode.");
>+
>+promise_test(function() {
>+  var img = new Image();
>+  img.srcset = "/images/green.png 100w";
>+  var first_promise = img.decode();
>+  var second_promise = img.decode();
>+  assert_not_equals(first_promise, second_promise);
>+  return Promise.all([
>+    first_promise,
>+    second_promise
>+  ]);
>+}, document.title + " Multiple decodes for images with srcset succeed.");
>+
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/w3c-import.log
>new file mode 100644
>index 00000000000..884f7b45463
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/w3c-import.log
>@@ -0,0 +1,24 @@
>+The tests in this directory were imported from the W3C repository.
>+Do NOT modify these tests directly in WebKit.
>+Instead, create a pull request on the WPT github:
>+	https://github.com/web-platform-tests/wpt
>+
>+Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
>+
>+Do NOT modify or remove this file.
>+
>+------------------------------------------------------------------------
>+Properties requiring vendor prefixes:
>+None
>+Property values requiring vendor prefixes:
>+None
>+------------------------------------------------------------------------
>+List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-iframe.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes-svg.tentative.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-picture.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-svg.tentative.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach-svg.tentative.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/environment-changes/viewport-change.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/environment-changes/viewport-change.html
>index 21624712cf9..f6ae65708c6 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/environment-changes/viewport-change.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/environment-changes/viewport-change.html
>@@ -39,7 +39,7 @@ onload = function() {
>       var expected = {wide:resolve(img.dataset.wide), narrow:resolve(img.dataset.narrow)};
>       var current = iframe.className;
>       var next = current === 'wide' ? 'narrow' : 'wide';
>-      var expect_change = expected[next].indexOf('broken.png') !== 0 && !('noChange' in img.dataset);
>+      var expect_change = expected[next].indexOf('broken.png') === -1 && !('noChange' in img.dataset);
> 
>       test(function() {
>         assert_equals(img.currentSrc, expected[current]);
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/environment-changes/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/environment-changes/w3c-import.log
>index b92218328a0..5aa0db6ca2a 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/environment-changes/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/environment-changes/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/img.complete.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/img.complete.html
>index 771b8e1b80e..42113cdd2ff 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/img.complete.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/img.complete.html
>@@ -11,6 +11,7 @@
> <img src="" id="imgTestTag2">
> <img id="imgTestTag3" style="width: 80px; height:auto;">
> <img id="imgTestTag4">
>+<img id="imgTestTag5">
> 
> <script>
>   var imageInstance = document.createElement('img');
>@@ -23,11 +24,11 @@
> <script>
>   test(function() {
>     assert_true(document.getElementById("imgTestTag").complete);
>-  }, "img src omitted");
>+  }, "img src and srcset omitted");
> 
>   test(function() {
>     assert_true(document.getElementById("imgTestTag2").complete);
>-  }, "img src empty");
>+  }, "img src and srcset empty");
> 
>   // test if set to true after img is completely available
>   var t = async_test("async src complete test");
>@@ -38,8 +39,9 @@
>       assert_false(loaded);
>       loaded = true;
>       assert_true(document.getElementById("imgTestTag3").complete);
>-      var currentSrc = document.getElementById("imgTestTag3").currentSrc
>-      assert_equals(new URL(window.location.origin + "/" + currentSrc).pathname, "/3.jpg");
>+      var currentSrc = document.getElementById("imgTestTag3").currentSrc;
>+      var expectedUrl = new URL("3.jpg", window.location);
>+      assert_equals(new URL(currentSrc).pathname, expectedUrl.pathname);
>     }, "Only one onload, despite setting the src twice");
> 
>     document.getElementById("imgTestTag3").src = 'test' + Math.random();
>@@ -49,6 +51,22 @@
>     document.getElementById("imgTestTag3").src = '3.jpg?nocache=' + Math.random();
>   });
> 
>+  var t1 = async_test("async srcset complete test");
>+  t1.step(function(){
>+    var loaded = false;
>+    document.getElementById("imgTestTag5").onload = t1.step_func_done(function(){
>+      assert_false(loaded);
>+      loaded = true;
>+      assert_true(document.getElementById("imgTestTag5").complete);
>+    }, "Only one onload, despite setting the srcset twice");
>+    //Test if src, srcset is omitted
>+    assert_true(document.getElementById("imgTestTag5").complete)
>+    document.getElementById("imgTestTag5").srcset = "/images/green-256x256.png 1x";
>+    //test if img.complete is set to false if srcset is present
>+    assert_false(document.getElementById("imgTestTag5").complete, "srcset present, should be set to false");
>+    //change src again, should make only one request as per 'await stable state'
>+    document.getElementById("imgTestTag5").srcset="/images/green-256x256.png 1.6x"
>+  });
> 
>   // https://html.spec.whatwg.org/multipage/multipage/embedded-content-1.html#update-the-image-data
>   // says to "await a stable state" before fetching so we use a separate <script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-with-responsive-images.tentative.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-with-responsive-images.tentative.html
>new file mode 100644
>index 00000000000..739765c0d44
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-with-responsive-images.tentative.html
>@@ -0,0 +1,96 @@
>+<!DOCTYPE html>
>+<body>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<script>
>+'use strict';
>+
>+const srcs = [
>+  "/images/green.svg",
>+  "/images/green.png",
>+];
>+
>+for (var src of srcs) {
>+  async_test(t => {
>+    var img = document.createElement('IMG');
>+    img.intrinsicSize = '400 x 500';
>+    var expected_intrinsic_width = 400;
>+    var expected_intrinsic_height = 500;
>+    var expected_width = expected_intrinsic_width;
>+    var expected_height = expected_intrinsic_height;
>+
>+    document.body.appendChild(img);
>+    img.addEventListener('load', t.step_func(() => {
>+      assert_equals(img.width, expected_width, 'width');
>+      assert_equals(img.height, expected_height, 'height');
>+      assert_equals(img.naturalWidth, expected_intrinsic_width, 'naturalWidth');
>+      assert_equals(img.naturalHeight, expected_intrinsic_height, 'naturalHeigh');
>+      t.done();
>+    }));
>+    img.srcset = src + ' 3x';
>+  }, 'Test image ' + src + ' with no specified sizes, width, or height');
>+
>+  async_test(t => {
>+    var img = document.createElement('IMG');
>+    img.intrinsicSize = '400 x 500';
>+    img.width = '800'; /* 2x of intrinsic width */
>+    var expected_intrinsic_width = 400;
>+    var expected_intrinsic_height = 500;
>+    var expected_width = expected_intrinsic_width * 2;
>+    var expected_height = expected_intrinsic_height * 2;
>+
>+    document.body.appendChild(img);
>+    img.addEventListener('load', t.step_func(() => {
>+      assert_equals(img.width, expected_width, 'width');
>+      assert_equals(img.height, expected_height, 'height');
>+      assert_equals(img.naturalWidth, expected_intrinsic_width, 'naturalWidth');
>+      assert_equals(img.naturalHeight, expected_intrinsic_height, 'naturalHeigh');
>+      t.done();
>+    }));
>+    img.srcset = src + ' 3x';
>+  }, 'Test image ' + src + ' with width = 800, no specified sizes, or height');
>+
>+  async_test(t => {
>+    var img = document.createElement('IMG');
>+    img.intrinsicSize = '400 x 500';
>+    img.width = '800';
>+    img.style = 'height:800px;';
>+    var expected_intrinsic_width = 400;
>+    var expected_intrinsic_height = 500;
>+    var expected_width = 800;
>+    var expected_height = 800;
>+
>+    document.body.appendChild(img);
>+    img.addEventListener('load', t.step_func(() => {
>+      assert_equals(img.width, expected_width, 'width');
>+      assert_equals(img.height, expected_height, 'height');
>+      assert_equals(img.naturalWidth, expected_intrinsic_width, 'naturalWidth');
>+      assert_equals(img.naturalHeight, expected_intrinsic_height, 'naturalHeigh');
>+      t.done();
>+    }));
>+    img.srcset = src + ' 3x';
>+  }, 'Test image ' + src + ' with width = 800, height = 800, and no specified sizes');
>+}
>+
>+async_test(t => {
>+  var img = document.createElement('IMG');
>+  img.intrinsicSize = '400 x 500';
>+  img.sizes = '100px';
>+  var expected_intrinsic_width = 100;
>+  var expected_intrinsic_height = 125;
>+  var expected_width = 100;
>+  var expected_height = 125;
>+
>+  document.body.appendChild(img);
>+  img.addEventListener('load', t.step_func(() => {
>+    assert_equals(img.width, expected_width, 'width');
>+    assert_equals(img.height, expected_height, 'height');
>+    assert_equals(img.naturalWidth, expected_intrinsic_width, 'naturalWidth');
>+    assert_equals(img.naturalHeight, expected_intrinsic_height, 'naturalHeigh');
>+    t.done();
>+  }));
>+  img.srcset = '/images/background.png 32w';
>+}, 'Test image (32 x 32) with sizes = 100 and srcset descriptor = 32w');
>+
>+</script>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html
>new file mode 100644
>index 00000000000..4192e567fcc
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html
>@@ -0,0 +1,66 @@
>+<!DOCTYPE html>
>+<body>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<script>
>+'use strict';
>+
>+const srcs = [
>+  "/images/green.svg",
>+  "/images/green.png",
>+];
>+
>+// Set new attribute, and wait til the media element is repainted.
>+function updateAttribute(e, attribute, value) {
>+  return new Promise(resolve => {
>+    requestAnimationFrame(() => requestAnimationFrame(() => resolve()));
>+    e.setAttribute(attribute, value);
>+  });
>+}
>+
>+for (var src of srcs) {
>+  promise_test(async() => {
>+    var img = document.createElement('IMG');
>+    document.body.appendChild(img);
>+    img.src = src;
>+    await new Promise(resolve =>
>+      img.addEventListener('load', () => resolve(), {once: true}));
>+    await updateAttribute(img, 'intrinsicSize', '400 x 500');
>+    assert_equals(img.width, 400, 'width');
>+    assert_equals(img.height, 500, 'height');
>+    assert_equals(img.naturalWidth, 400, 'naturalWidth');
>+    assert_equals(img.naturalHeight, 500, 'naturalHeight');
>+
>+    await updateAttribute(img, 'width', '800');
>+    assert_equals(img.width, 800, 'width');
>+    assert_equals(img.height, 1000, 'height');
>+    assert_equals(img.naturalWidth, 400, 'naturalWidth');
>+    assert_equals(img.naturalHeight, 500, 'naturalHeight');
>+
>+    await updateAttribute(img, 'style', 'height:800px;');
>+    assert_equals(img.width, 800, 'width');
>+    assert_equals(img.height, 800, 'height');
>+    assert_equals(img.naturalWidth, 400, 'naturalWidth');
>+    assert_equals(img.naturalHeight, 500, 'naturalHeight');
>+
>+    await updateAttribute(img, 'width', '');
>+    assert_equals(img.width, 640, 'width');
>+    assert_equals(img.height, 800, 'height');
>+    assert_equals(img.naturalWidth, 400, 'naturalWidth');
>+    assert_equals(img.naturalHeight, 500, 'naturalHeight');
>+
>+    await updateAttribute(img, 'style', 'height:800px; writing-mode: vertical-rl;');
>+    assert_equals(img.width, 640, 'width');
>+    assert_equals(img.height, 800, 'height');
>+    assert_equals(img.naturalWidth, 400, 'naturalWidth');
>+    assert_equals(img.naturalHeight, 500, 'naturalHeight');
>+
>+    await updateAttribute(img, 'style', 'height:800px; writing-mode: horizontal-tb;');
>+    assert_equals(img.width, 640, 'width');
>+    assert_equals(img.height, 800, 'height');
>+    assert_equals(img.naturalWidth, 400, 'naturalWidth');
>+    assert_equals(img.naturalHeight, 500, 'naturalHeight');
>+  }, 'Test intrinsicsize for html image element, src=' + src);
>+}
>+</script>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html.headers b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html.headers
>new file mode 100644
>index 00000000000..4fbf3f5addd
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html.headers
>@@ -0,0 +1 @@
>+Feature-Policy: unsized-media *
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/w3c-import.log
>new file mode 100644
>index 00000000000..f753c564249
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/w3c-import.log
>@@ -0,0 +1,19 @@
>+The tests in this directory were imported from the W3C repository.
>+Do NOT modify these tests directly in WebKit.
>+Instead, create a pull request on the WPT github:
>+	https://github.com/web-platform-tests/wpt
>+
>+Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
>+
>+Do NOT modify or remove this file.
>+
>+------------------------------------------------------------------------
>+Properties requiring vendor prefixes:
>+None
>+Property values requiring vendor prefixes:
>+None
>+------------------------------------------------------------------------
>+List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-with-responsive-images.tentative.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html.headers
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/invalid-src.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/invalid-src.html
>index f1fbe34c596..49e956565cc 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/invalid-src.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/invalid-src.html
>@@ -8,7 +8,7 @@
> <script>
> async_test(function(t) {
>     var img = document.getElementById("brokenurl");
>-    img.src = "http://also a broken url";
>+    img.src = "http://[";
>     var errorevent = false;
> 
>     // The errors should be queued in the event loop, so they should only trigger
>@@ -17,7 +17,7 @@ async_test(function(t) {
>     img.addEventListener('loadend', t.step_func_done(function() {
>         assert_true(errorevent, "error event fired");
>     }));
>-}, 'src="http://also a broken url"');
>+}, 'src="http://["');
> 
> async_test(function(t) {
>     var img = document.getElementById("emptysrc");
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/ismap/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/ismap/w3c-import.log
>index f38793383f8..1e1d4c9a58b 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/ismap/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/ismap/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/null-image-source.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/null-image-source.html
>new file mode 100644
>index 00000000000..89992765036
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/null-image-source.html
>@@ -0,0 +1,30 @@
>+<!doctype html>
>+<meta charset="utf-8">
>+<title>Null image source check for src, srcset and picture parent</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<div id=log></div>
>+<img id="src_id" src="">
>+<img id="srcset_id" srcset="">
>+<picture><img id="parent_picture_id"></picture>
>+<script>
>+async_test(function(t) {
>+    img = document.getElementById('src_id');
>+    img.onerror = t.step_func(function(e) {
>+        assert_equals(e.type, "error", "null image source check failed");
>+        t.done();
>+    });
>+}, "img with empty src");
>+
>+async_test(function(t) {
>+    img = document.getElementById('srcset_id');
>+    img.onerror = t.unreached_func("empty srcset fires an error");
>+    t.step_timeout(function() { t.done(); }, 2000);
>+}, "img with empty srcset");
>+
>+async_test(function(t) {
>+    img = document.getElementById('parent_picture_id');
>+    img.onerror = t.unreached_func("null img with picture parent fires an error");
>+    t.step_timeout(function() { t.done(); }, 2000);
>+}, "img with picture parent");
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations.html
>new file mode 100644
>index 00000000000..c8e09e8d0b8
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations.html
>@@ -0,0 +1,416 @@
>+<!doctype html>
>+<title>img relevant mutations</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<div id=log></div>
>+
>+
>+
>+<img data-desc="src set">
>+<img src="/images/green-2x2.png" data-desc="src changed">
>+<img src="/images/green-2x2.png" data-desc="src removed">
>+
>+<img data-desc="srcset set">
>+<img srcset="/images/green-2x2.png" data-desc="srcset changed">
>+<img srcset="/images/green-2x2.png" data-desc="srcset removed">
>+
>+<img data-desc="sizes set">
>+<img sizes="" data-desc="sizes changed">
>+<img sizes="" data-desc="sizes removed">
>+
>+<img src="/images/green-2x2.png" data-desc="src set to same value">
>+
>+<img data-desc="crossorigin absent to empty">
>+<img data-desc="crossorigin absent to anonymous">
>+<img data-desc="crossorigin absent to use-credentials">
>+<img crossorigin data-desc="crossorigin empty to absent">
>+<img crossorigin data-desc="crossorigin empty to use-credentials">
>+<img crossorigin=anonymous data-desc="crossorigin anonymous to absent">
>+<img crossorigin=anonymous data-desc="crossorigin anonymous to use-credentials">
>+<img crossorigin=use-credentials data-desc="crossorigin use-credentials to absent">
>+<img crossorigin=use-credentials data-desc="crossorigin use-credentials to empty">
>+<img crossorigin=use-credentials data-desc="crossorigin use-credentials to anonymous">
>+
>+<img src="/images/green-2x2.png" data-desc="inserted into picture"><picture></picture>
>+
>+<picture><img src="/images/green-2x2.png" data-desc="removed from picture"></picture>
>+
>+<picture><img src="/images/green-2x2.png" data-desc="parent is picture, previous source inserted"></picture>
>+
>+<picture><source><img src="/images/green-2x2.png" data-desc="parent is picture, previous source removed"></picture>
>+
>+<picture><source><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has srcset set"></picture>
>+<picture><source srcset=""><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has srcset changed"></picture>
>+<picture><source srcset=""><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has srcset removed"></picture>
>+
>+<picture><source><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has sizes set"></picture>
>+<picture><source sizes=""><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has sizes changed"></picture>
>+<picture><source sizes=""><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has sizes removed"></picture>
>+
>+<picture><source><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has media set"></picture>
>+<picture><source media=""><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has media changed"></picture>
>+<picture><source media=""><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has media removed"></picture>
>+
>+<picture><source><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has type set"></picture>
>+<picture><source type=""><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has type changed"></picture>
>+<picture><source type=""><img src="/images/green-2x2.png" data-desc="parent is picture, previous source has type removed"></picture>
>+
>+
>+
>+<img srcset="/images/green-2x2.png" data-desc="srcset is set to same value">
>+<img srcset="/images/green-2x2.png" sizes data-desc="sizes is set to same value">
>+
>+<img src="/images/green-2x2.png" data-desc="crossorigin state not changed: absent, removeAttribute">
>+<img src="/images/green-2x2.png" crossorigin data-desc="crossorigin state not changed: empty to anonymous">
>+<img src="/images/green-2x2.png" crossorigin=anonymous data-desc="crossorigin state not changed: anonymous to foobar">
>+<img src="/images/green-2x2.png" crossorigin=use-credentials data-desc="crossorigin state not changed: use-credentials to USE-CREDENTIALS">
>+
>+<img src="/images/green-2x2.png" data-desc="inserted into picture ancestor"><picture><span></span></picture>
>+<picture><span><img src="/images/green-2x2.png" data-desc="removed from picture ancestor"></span></picture>
>+
>+<picture><span><img src="/images/green-2x2.png" data-desc="ancestor picture has a source inserted"></span></picture>
>+<picture><source><span><img src="/images/green-2x2.png" data-desc="ancestor picture has a source removed"></span></picture>
>+
>+<picture><span><img src="/images/green-2x2.png" data-desc="ancestor picture; previous sibling source inserted"></span></picture>
>+<picture><span><source><img src="/images/green-2x2.png" data-desc="ancestor picture; previous sibling source removed"></span></picture>
>+
>+<picture><img src="/images/green-2x2.png" data-desc="parent is picture, following sibling source inserted"></picture>
>+<picture><img src="/images/green-2x2.png" data-desc="parent is picture, following sibling source removed"><source></picture>
>+
>+<picture><img src="/images/green-2x2.png" data-desc="parent is picture, following sibling source has srcset set"><source></picture>
>+
>+<img src="/images/green-2x2.png" data-desc="media on img set">
>+<img src="/images/green-2x2.png" data-desc="type on img set">
>+<img src="/images/green-2x2.png" data-desc="class on img set">
>+<img src="/images/green-2x2.png" data-desc="alt on img set">
>+
>+<picture><source><img src="/images/green-2x2.png" data-desc="src on previous sibling source set"></picture>
>+<picture><source><img src="/images/green-2x2.png" data-desc="class on previous sibling source set"></picture>
>+
>+<img src="/images/green-2x2.png" data-desc="inserted/removed children of img">
>+
>+<picture><img src="/images/green-2x2.png" data-desc="picture is inserted; img has src"></picture><span></span>
>+<picture><img srcset="/images/green-2x2.png" data-desc="picture is inserted; img has srcset"></picture><span></span>
>+<picture><source srcset="/images/green-2x2.png"><img src="/images/green-2x2.png" data-desc="picture is inserted; img has previous sibling source"></picture><span></span>
>+<picture><img src="/images/green-2x2.png" data-desc="picture is inserted; img has following sibling source"><source srcset="/images/green-2x2.png"></picture><span></span>
>+
>+<picture><img src="/images/green-2x2.png" data-desc="picture is removed; img has src"></picture>
>+<picture><img srcset="/images/green-2x2.png" data-desc="picture is removed; img has srcset"></picture>
>+<picture><source srcset="/images/green-2x2.png"><img src="/images/green-2x2.png" data-desc="picture is removed; img has previous sibling source"></picture>
>+<picture><img src="/images/green-2x2.png" data-desc="picture is removed; img has following sibling source"><source srcset="/images/green-2x2.png"></picture>
>+
>+<picture><img src="/images/green-2x2.png" data-desc="parent is picture, following img inserted"></picture>
>+<picture><img src="/images/green-2x2.png" data-desc="parent is picture, following img removed"><img></picture>
>+<picture><img src="/images/green-2x2.png" data-desc="parent is picture, following img has src set"><img></picture>
>+<picture><img src="/images/green-2x2.png" data-desc="parent is picture, following img has srcset set"><img></picture>
>+<picture><img src="/images/green-2x2.png" data-desc="parent is picture, following img has sizes set"><img></picture>
>+
>+
>+<script>
>+setup({explicit_done:true});
>+
>+function t(desc, func, expect) {
>+  async_test(function() {
>+    var img = document.querySelector('[data-desc="' + desc + '"]');
>+    img.onload = img.onerror = this.unreached_func('update the image data was run');
>+    if (expect == 'timeout') {
>+      setTimeout(this.step_func_done(), 1000);
>+    } else {
>+      img['on' + expect] = this.step_func_done(function() {});
>+    }
>+    func.call(this, img);
>+  }, desc);
>+}
>+
>+onload = function() {
>+
>+  t('src set', function(img) {
>+    img.src = '/images/green-2x2.png';
>+  }, 'load');
>+
>+  t('src changed', function(img) {
>+    img.src = '/images/green-2x2.png ';
>+  }, 'load');
>+
>+  t('src removed', function(img) {
>+    img.removeAttribute('src');
>+  }, 'timeout');
>+
>+  t('srcset set', function(img) {
>+    img.srcset = '/images/green-2x2.png';
>+  }, 'load');
>+
>+  t('srcset changed', function(img) {
>+    img.srcset = '/images/green-2x2.png ';
>+  }, 'load');
>+
>+  t('srcset removed', function(img) {
>+    img.removeAttribute('srcset');
>+  }, 'timeout');
>+
>+  t('sizes set', function(img) {
>+    img.sizes = '';
>+  }, 'timeout');
>+
>+  t('sizes changed', function(img) {
>+    img.sizes = ' ';
>+  }, 'timeout');
>+
>+  t('sizes removed', function(img) {
>+    img.removeAttribute('sizes');
>+  }, 'timeout');
>+
>+  t('src set to same value', function(img) {
>+    img.src = '/images/green-2x2.png';
>+  }, 'load');
>+
>+  t('crossorigin absent to empty', function(img) {
>+    img.crossOrigin = '';
>+  }, 'timeout');
>+
>+  t('crossorigin absent to anonymous', function(img) {
>+    img.crossOrigin = 'anonymous';
>+  }, 'timeout');
>+
>+  t('crossorigin absent to use-credentials', function(img) {
>+    img.crossOrigin = 'use-credentials';
>+  }, 'timeout');
>+
>+  t('crossorigin empty to absent', function(img) {
>+    img.removeAttribute('crossorigin');
>+  }, 'timeout');
>+
>+  t('crossorigin empty to use-credentials', function(img) {
>+    img.crossOrigin = 'use-credentials';
>+  }, 'timeout');
>+
>+  t('crossorigin anonymous to absent', function(img) {
>+    img.removeAttribute('crossorigin');
>+  }, 'timeout');
>+
>+  t('crossorigin anonymous to use-credentials', function(img) {
>+    img.crossOrigin = 'use-credentials';
>+  }, 'timeout');
>+
>+  t('crossorigin use-credentials to absent', function(img) {
>+    img.removeAttribute('crossorigin');
>+  }, 'timeout');
>+
>+  t('crossorigin use-credentials to empty', function(img) {
>+    img.crossOrigin = '';
>+  }, 'timeout');
>+
>+  t('crossorigin use-credentials to anonymous', function(img) {
>+    img.crossOrigin = 'anonymous';
>+  }, 'timeout');
>+
>+  t('inserted into picture', function(img) {
>+    img.nextSibling.appendChild(img);
>+  }, 'load');
>+
>+  t('removed from picture', function(img) {
>+    img.parentNode.removeChild(img);
>+  }, 'load');
>+
>+  t('parent is picture, previous source inserted', function(img) {
>+    img.parentNode.insertBefore(document.createElement('source'), img);
>+  }, 'load');
>+
>+  t('parent is picture, previous source removed', function(img) {
>+    img.parentNode.removeChild(img.previousSibling);
>+  }, 'load');
>+
>+  t('parent is picture, previous source has srcset set', function(img) {
>+    img.previousSibling.srcset = '';
>+  }, 'load');
>+
>+  t('parent is picture, previous source has srcset changed', function(img) {
>+    img.previousSibling.srcset = ' ';
>+  }, 'load');
>+
>+  t('parent is picture, previous source has srcset removed', function(img) {
>+    img.previousSibling.removeAttribute('srcset');
>+  }, 'load');
>+
>+  t('parent is picture, previous source has sizes set', function(img) {
>+    img.previousSibling.sizes = '';
>+  }, 'load');
>+
>+  t('parent is picture, previous source has sizes changed', function(img) {
>+    img.previousSibling.sizes = ' ';
>+  }, 'load');
>+
>+  t('parent is picture, previous source has sizes removed', function(img) {
>+    img.previousSibling.removeAttribute('sizes');
>+  }, 'load');
>+
>+  t('parent is picture, previous source has media set', function(img) {
>+    img.previousSibling.media = '';
>+  }, 'load');
>+
>+  t('parent is picture, previous source has media changed', function(img) {
>+    img.previousSibling.media = ' ';
>+  }, 'load');
>+
>+  t('parent is picture, previous source has media removed', function(img) {
>+    img.previousSibling.removeAttribute('media');
>+  }, 'load');
>+
>+  t('parent is picture, previous source has type set', function(img) {
>+    img.previousSibling.type = '';
>+  }, 'load');
>+
>+  t('parent is picture, previous source has type changed', function(img) {
>+    img.previousSibling.type = ' ';
>+  }, 'load');
>+
>+  t('parent is picture, previous source has type removed', function(img) {
>+    img.previousSibling.removeAttribute('type');
>+  }, 'load');
>+
>+  t('srcset is set to same value', function(img) {
>+    img.srcset = "/images/green-2x2.png";
>+  }, 'timeout');
>+
>+  t('sizes is set to same value', function(img) {
>+    img.sizes = '';
>+  }, 'timeout');
>+
>+  t('crossorigin state not changed: absent, removeAttribute', function(img) {
>+    img.removeAttribute('crossorigin');
>+  }, 'timeout');
>+
>+  t('crossorigin state not changed: empty to anonymous', function(img) {
>+    img.crossOrigin = 'anonymous';
>+  }, 'timeout');
>+
>+  t('crossorigin state not changed: anonymous to foobar', function(img) {
>+    img.crossOrigin = 'foobar';
>+  }, 'timeout');
>+
>+  t('crossorigin state not changed: use-credentials to USE-CREDENTIALS', function(img) {
>+    img.crossOrigin = 'USE-CREDENTIALS';
>+  }, 'timeout');
>+
>+  t('inserted into picture ancestor', function(img) {
>+    img.nextSibling.firstChild.appendChild(img);
>+  }, 'timeout');
>+
>+  t('removed from picture ancestor', function(img) {
>+    img.parentNode.removeChild(img);
>+  }, 'timeout');
>+
>+  t('ancestor picture has a source inserted', function(img) {
>+    img.parentNode.parentNode.insertBefore(document.createElement('source'), img.parentNode);
>+  }, 'timeout');
>+
>+  t('ancestor picture has a source removed', function(img) {
>+    img.parentNode.parentNode.removeChild(img.parentNode.previousSibling);
>+  }, 'timeout');
>+
>+  t('ancestor picture; previous sibling source inserted', function(img) {
>+    img.parentNode.insertBefore(document.createElement('source'), img);
>+  }, 'timeout');
>+
>+  t('ancestor picture; previous sibling source removed', function(img) {
>+    img.parentNode.removeChild(img.previousSibling);
>+  }, 'timeout');
>+
>+  t('parent is picture, following sibling source inserted', function(img) {
>+    img.parentNode.appendChild(document.createElement('source'));
>+  }, 'timeout');
>+
>+  t('parent is picture, following sibling source removed', function(img) {
>+    img.parentNode.removeChild(img.nextSibling);
>+  }, 'timeout');
>+
>+  t('parent is picture, following sibling source has srcset set', function(img) {
>+    img.nextSibling.srcset = '';
>+  }, 'timeout');
>+
>+  t('media on img set', function(img) {
>+    img.setAttribute('media', '');
>+  }, 'timeout');
>+
>+  t('type on img set', function(img) {
>+    img.setAttribute('type', '');
>+  }, 'timeout');
>+
>+  t('class on img set', function(img) {
>+    img.className = '';
>+  }, 'timeout');
>+
>+  t('alt on img set', function(img) {
>+    img.alt = '';
>+  }, 'timeout');
>+
>+  t('src on previous sibling source set', function(img) {
>+    img.previousSibling.setAttribute('src', '');
>+  }, 'timeout');
>+
>+  t('class on previous sibling source set', function(img) {
>+    img.previousSibling.className = '';
>+  }, 'timeout');
>+
>+  t('inserted/removed children of img', function(img) {
>+    img.appendChild(document.createElement('source'));
>+    setTimeout(this.step_func(function() {
>+      img.removeChild(img.firstChild);
>+    }), 0);
>+  }, 'timeout');
>+
>+  t('picture is inserted; img has src', function(img) {
>+    img.parentNode.nextSibling.appendChild(img.parentNode);
>+  }, 'timeout');
>+
>+  t('picture is inserted; img has srcset', function(img) {
>+    img.parentNode.nextSibling.appendChild(img.parentNode);
>+  }, 'timeout');
>+
>+  t('picture is inserted; img has previous sibling source', function(img) {
>+    img.parentNode.nextSibling.appendChild(img.parentNode);
>+  }, 'timeout');
>+
>+  t('picture is inserted; img has following sibling source', function(img) {
>+    img.parentNode.nextSibling.appendChild(img.parentNode);
>+  }, 'timeout');
>+
>+  t('picture is removed; img has src', function(img) {
>+    img.parentNode.parentNode.removeChild(img.parentNode);
>+  }, 'timeout');
>+
>+  t('picture is removed; img has srcset', function(img) {
>+    img.parentNode.parentNode.removeChild(img.parentNode);
>+  }, 'timeout');
>+
>+  t('picture is removed; img has previous sibling source', function(img) {
>+    img.parentNode.parentNode.removeChild(img.parentNode);
>+  }, 'timeout');
>+
>+  t('picture is removed; img has following sibling source', function(img) {
>+    img.parentNode.parentNode.removeChild(img.parentNode);
>+  }, 'timeout');
>+
>+  t('parent is picture, following img inserted', function(img) {
>+    img.parentNode.appendChild(document.createElement('img'));
>+  }, 'timeout');
>+
>+  t('parent is picture, following img removed', function(img) {
>+    img.parentNode.removeChild(img.nextSibling);
>+  }, 'timeout');
>+
>+  t('parent is picture, following img has src set', function(img) {
>+    img.nextSibling.src = '';
>+  }, 'timeout');
>+
>+  t('parent is picture, following img has srcset set', function(img) {
>+    img.nextSibling.srcset = '';
>+  }, 'timeout');
>+
>+  t('parent is picture, following img has sizes set', function(img) {
>+    img.nextSibling.sizes = '';
>+  }, 'timeout');
>+
>+  done();
>+};
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/resources/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/resources/w3c-import.log
>index cd01bd931ce..001cc3ef573 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/resources/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/resources/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-display-none.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-display-none.html
>new file mode 100644
>index 00000000000..6aa77ebf85b
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-display-none.html
>@@ -0,0 +1,7 @@
>+<!doctype html>
>+<title>img parse a sizes attribute (display:none)</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<div id=log></div>
>+<iframe data-desc="display:none" style="width:1000px; height:1000px" src="support/sizes-iframed.sub.html?doctype=doctype%20html&style=display:none"></iframe>
>+<script src="support/parse-a-sizes-attribute.js"></script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-quirks-mode.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-quirks-mode.html
>new file mode 100644
>index 00000000000..2150192d296
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-quirks-mode.html
>@@ -0,0 +1,7 @@
>+<!doctype html>
>+<title>img parse a sizes attribute (quirks mode)</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<div id=log></div>
>+<iframe data-desc="quirks mode" style="width:1000px; height:1000px" src="support/sizes-iframed.sub.html?doctype=----&style="></iframe>
>+<script src="support/parse-a-sizes-attribute.js"></script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-standards-mode.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-standards-mode.html
>new file mode 100644
>index 00000000000..6e70c88396d
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-standards-mode.html
>@@ -0,0 +1,7 @@
>+<!doctype html>
>+<title>img parse a sizes attribute (standards mode)</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<div id=log></div>
>+<iframe data-desc="standards mode" style="width:1000px; height:1000px" src="support/sizes-iframed.sub.html?doctype=doctype%20html&style="></iframe>
>+<script src="support/parse-a-sizes-attribute.js"></script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-width-1000px.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-width-1000px.html
>new file mode 100644
>index 00000000000..ab3f69e0583
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-width-1000px.html
>@@ -0,0 +1,7 @@
>+<!doctype html>
>+<title>img parse a sizes attribute (width:1000px)</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<div id=log></div>
>+<iframe data-desc="width:1000px" style="width:1000px; height:1000px" src="support/sizes-iframed.sub.html?doctype=doctype%20html&style=width:1000px%3B%20height:16px"></iframe>
>+<script src="support/parse-a-sizes-attribute.js"></script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute.html
>deleted file mode 100644
>index bd204542081..00000000000
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute.html
>+++ /dev/null
>@@ -1,42 +0,0 @@
>-<!doctype html>
>-<title>img parse a sizes attribute</title>
>-<meta name="timeout" content="long">
>-<script src="/resources/testharness.js"></script>
>-<script src="/resources/testharnessreport.js"></script>
>-<div id=log></div>
>-<iframe data-desc="standards mode" style="width:1000px; height:1000px" src="sizes-iframed.sub.html?doctype=doctype%20html&style="></iframe>
>-<iframe data-desc="quirks mode" style="width:1000px; height:1000px" src="sizes-iframed.sub.html?doctype=----&style="></iframe>
>-<iframe data-desc="display:none" style="width:1000px; height:1000px" src="sizes-iframed.sub.html?doctype=doctype%20html&style=display:none"></iframe>
>-<iframe data-desc="width:1000px" style="width:1000px; height:1000px" src="sizes-iframed.sub.html?doctype=doctype%20html&style=width:1000px%3B%20height:16px"></iframe>
>-<script>
>-setup({explicit_done:true});
>-
>-function check(p, iframe) {
>-  var current = p.firstElementChild;
>-  var ref_sizes = current.getAttribute('sizes');
>-  var expect = p.firstElementChild.currentSrc;
>-  if (expect) {
>-    expect = expect.split('?')[0];
>-  }
>-  while (current = current.nextElementSibling) {
>-    test(function() {
>-      if (expect === '' || expect === null || expect === undefined) {
>-        assert_unreached('ref currentSrc was ' + format_value(expect));
>-      }
>-      var got = current.currentSrc;
>-      assert_greater_than(got.indexOf('?'), -1, 'expected a "?" in currentSrc');
>-      got = got.split('?')[0];
>-      assert_equals(got, expect);
>-    }, current.outerHTML + ' ref sizes=' + format_value(ref_sizes) + ' (' + iframe.getAttribute('data-desc') + ')');
>-  }
>-}
>-
>-onload = function() {
>-  [].forEach.call(document.querySelectorAll('iframe'), function(iframe) {
>-    [].forEach.call(iframe.contentDocument.querySelectorAll('p'), function(p) {
>-      check(p, iframe);
>-    });
>-  });
>-  done();
>-}
>-</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-001-expected.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-001-expected.html
>new file mode 100644
>index 00000000000..68466ae94d4
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-001-expected.html
>@@ -0,0 +1,4 @@
>+<!doctype html>
>+<title>Test reference</title>
>+<link rel="author" title="Emilio Cobos Ãlvarez" href="mailto:emilio@crisal.io">
>+<iframe width="500" height="500" srcdoc='<!doctype html><img alt="FAIL" srcset="/images/green-256x256.png 100w" style="max-width: 100%" sizes="10px">'></iframe>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-001.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-001.html
>new file mode 100644
>index 00000000000..51f8145bf97
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-001.html
>@@ -0,0 +1,20 @@
>+<!doctype html>
>+<html class="reftest-wait">
>+<title>Image intrinsic size specified via sizes attribute reacts properly to media changes</title>
>+<link rel="author" title="Emilio Cobos Ãlvarez" href="mailto:emilio@crisal.io">
>+<link rel="match" href="sizes-dynamic-001-ref.html">
>+<link rel="help" href="https://html.spec.whatwg.org/#sizes-attributes">
>+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1149357">
>+<script>
>+function frameLoaded(frame) {
>+  frame.width = "500";
>+  let img = frame.contentDocument.querySelector('img');
>+
>+  // Trigger the viewport resize, which will trigger the image load task.
>+  img.offsetWidth;
>+
>+  // Wait for the image load task to run.
>+  setTimeout(() => document.documentElement.removeAttribute("class"), 0);
>+}
>+</script>
>+<iframe onload="frameLoaded(this)" width="200" height="500" srcdoc='<!doctype html><img srcset="/images/green-256x256.png 100w" style="max-width: 100%" sizes="(min-width: 400px) 10px, 20px">'></iframe>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-002-expected.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-002-expected.html
>new file mode 100644
>index 00000000000..68466ae94d4
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-002-expected.html
>@@ -0,0 +1,4 @@
>+<!doctype html>
>+<title>Test reference</title>
>+<link rel="author" title="Emilio Cobos Ãlvarez" href="mailto:emilio@crisal.io">
>+<iframe width="500" height="500" srcdoc='<!doctype html><img alt="FAIL" srcset="/images/green-256x256.png 100w" style="max-width: 100%" sizes="10px">'></iframe>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-002.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-002.html
>new file mode 100644
>index 00000000000..6c64b3da392
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-002.html
>@@ -0,0 +1,33 @@
>+<!doctype html>
>+<html class="reftest-wait">
>+<title>Image intrinsic size specified via sizes attribute reacts properly to media changes in Shadow DOM</title>
>+<link rel="author" title="Emilio Cobos Ãlvarez" href="mailto:emilio@crisal.io">
>+<link rel="match" href="sizes-dynamic-001-ref.html">
>+<link rel="help" href="https://html.spec.whatwg.org/#sizes-attributes">
>+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1149357">
>+<script>
>+function frameLoaded(frame) {
>+  let doc = frame.contentDocument;
>+  let shadow = doc.getElementById("host").attachShadow({ mode: "open" });
>+
>+  let img = doc.createElement("img");
>+  img.srcset = "/images/green-256x256.png 100w";
>+  img.style.maxWidth = "100%";
>+  img.setAttribute("sizes", "(min-width: 400px) 10px, 20px");
>+
>+  img.onload = function() {
>+    img.offsetWidth; // Flush layout.
>+
>+    frame.width = "500";
>+
>+    // Trigger the viewport resize, which will trigger the image load task.
>+    img.offsetWidth;
>+
>+    // Wait for the image load task to run.
>+    setTimeout(() => document.documentElement.removeAttribute("class"), 0);
>+  };
>+
>+  shadow.appendChild(img);
>+}
>+</script>
>+<iframe onload="frameLoaded(this)" width="200" height="500" srcdoc='<!doctype html><div id="host"></div>'></iframe>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/parse-a-sizes-attribute.js b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/parse-a-sizes-attribute.js
>new file mode 100644
>index 00000000000..62ad00a4682
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/parse-a-sizes-attribute.js
>@@ -0,0 +1,29 @@
>+setup({explicit_done:true});
>+
>+function check(p, iframe) {
>+  var current = p.firstElementChild;
>+  var ref_sizes = current.getAttribute('sizes');
>+  var expect = current.currentSrc;
>+  if (expect) {
>+    expect = expect.split('?')[0];
>+  }
>+  while (current = current.nextElementSibling) {
>+    test(function() {
>+      if (expect === '' || expect === null || expect === undefined) {
>+        assert_unreached('ref currentSrc was ' + format_value(expect));
>+      }
>+      var got = current.currentSrc;
>+      assert_greater_than(got.indexOf('?'), -1, 'expected a "?" in currentSrc');
>+      got = got.split('?')[0];
>+      assert_equals(got, expect);
>+    }, current.outerHTML + ' ref sizes=' + format_value(ref_sizes) + ' (' + iframe.getAttribute('data-desc') + ')');
>+  }
>+}
>+
>+onload = function() {
>+  var iframe = document.querySelector('iframe');
>+  [].forEach.call(iframe.contentDocument.querySelectorAll('p'), function(p) {
>+    check(p, iframe);
>+  });
>+  done();
>+}
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-iframed.sub.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/sizes-iframed.sub.html
>similarity index 93%
>rename from LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-iframed.sub.html
>rename to LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/sizes-iframed.sub.html
>index 925bb46996d..c564a5845d5 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-iframed.sub.html
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/sizes-iframed.sub.html
>@@ -52,8 +52,14 @@
> <img srcset='/images/green-1x1.png?e34 50w, /images/green-16x16.png?e34 51w' sizes='\[,1px'>
> <img srcset='/images/green-1x1.png?e35 50w, /images/green-16x16.png?e35 51w' sizes='1\p\x'>
> <img srcset='/images/green-1x1.png?e36 50w, /images/green-16x16.png?e36 51w' sizes='calc(1px)'>
>+<img srcset='/images/green-1x1.png?e36a 50w, /images/green-16x16.png?e36a 51w' sizes='min(1px, 100px)'>
>+<img srcset='/images/green-1x1.png?e36b 50w, /images/green-16x16.png?e36b 51w' sizes='min(-100px, 1px)'>
> <img srcset='/images/green-1x1.png?e37 50w, /images/green-16x16.png?e37 51w' sizes='(min-width:0) calc(1px)'>
>+<img srcset='/images/green-1x1.png?e37a 50w, /images/green-16x16.png?e37a 51w' sizes='(min-width:0) min(1px, 100px)'>
>+<img srcset='/images/green-1x1.png?e37b 50w, /images/green-16x16.png?e37b 51w' sizes='(min-width:0) max(-100px, 1px)'>
> <img srcset='/images/green-1x1.png?e38 50w, /images/green-16x16.png?e38 51w' sizes='(min-width:calc(0)) 1px'>
>+<img srcset='/images/green-1x1.png?e38a 50w, /images/green-16x16.png?e38a 51w' sizes='(min-width:min(0, 200vw)) 1px'>
>+<img srcset='/images/green-1x1.png?e38b 50w, /images/green-16x16.png?e38b 51w' sizes='(min-width:max(-200vw, 0)) 1px'>
> <img srcset='/images/green-1x1.png?e39 50w, /images/green-16x16.png?e39 51w' sizes='(min-width:0) 1px, 100vw'>
> <img srcset='/images/green-1x1.png?e40 50w, /images/green-16x16.png?e40 51w' sizes='(min-width:0) 1px, (min-width:0) 100vw, 100vw'>
> <img srcset='/images/green-1x1.png?e41 50w, /images/green-16x16.png?e41 51w' sizes='(min-width:0) 1px'>
>@@ -126,7 +132,11 @@
> <img srcset='/images/green-1x1.png?e108 50w, /images/green-16x16.png?e108 51w' sizes='(max-width:0) or (unknown-general-enclosed !) 100vw, 1px'>
> <img srcset='/images/green-1x1.png?e109 50w, /images/green-16x16.png?e109 51w' sizes='not ((max-width:0) or (unknown "general-enclosed")) 100vw, 1px'>
> <img srcset='/images/green-1x1.png?f48 50w, /images/green-16x16.png?f48 51w' sizes='calc(1px'>
>+<img srcset='/images/green-1x1.png?f48a 50w, /images/green-16x16.png?f48a 51w' sizes='min(1px, 200vw'>
>+<img srcset='/images/green-1x1.png?f48b 50w, /images/green-16x16.png?f48b 51w' sizes='max(-200vw, 1px'>
> <img srcset='/images/green-1x1.png?f49 50w, /images/green-16x16.png?f49 51w' sizes='(min-width:0) calc(1px'>
>+<img srcset='/images/green-1x1.png?f49a 50w, /images/green-16x16.png?f49a 51w' sizes='(min-width:0) min(1px, 200vw'>
>+<img srcset='/images/green-1x1.png?f49b 50w, /images/green-16x16.png?f49b 51w' sizes='(min-width:0) max(-200vw, 1px'>
> 
> <p>
> <img srcset='/images/green-1x1.png?f1 50w, /images/green-16x16.png?f1 51w' sizes='100vw'>
>@@ -146,6 +156,7 @@
> <img srcset='/images/green-1x1.png?f15 50w, /images/green-16x16.png?f15 51w' sizes='0.1dpi'>
> <img srcset='/images/green-1x1.png?f16 50w, /images/green-16x16.png?f16 51w' sizes='0.1dpcm'>
> <img srcset='/images/green-1x1.png?f17 50w, /images/green-16x16.png?f17 51w' sizes='0.1dppx'>
>+<img srcset='/images/green-1x1.png?f17a 50w, /images/green-16x16.png?f17a 51w' sizes='0.1x'>
> <img srcset='/images/green-1x1.png?f18 50w, /images/green-16x16.png?f18 51w' data-foo='1px' sizes='attr(data-foo, length, 1px)'>
> <img srcset='/images/green-1x1.png?f19 50w, /images/green-16x16.png?f19 51w' data-foo='1' sizes='attr(data-foo, px, 1px)'>
> <img srcset='/images/green-1x1.png?f20 50w, /images/green-16x16.png?f20 51w' sizes='toggle(1px)'>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/w3c-import.log
>new file mode 100644
>index 00000000000..d58deda57ab
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/w3c-import.log
>@@ -0,0 +1,18 @@
>+The tests in this directory were imported from the W3C repository.
>+Do NOT modify these tests directly in WebKit.
>+Instead, create a pull request on the WPT github:
>+	https://github.com/web-platform-tests/wpt
>+
>+Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
>+
>+Do NOT modify or remove this file.
>+
>+------------------------------------------------------------------------
>+Properties requiring vendor prefixes:
>+None
>+Property values requiring vendor prefixes:
>+None
>+------------------------------------------------------------------------
>+List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/parse-a-sizes-attribute.js
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/sizes-iframed.sub.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/w3c-import.log
>index 6e683bedd2b..2f5c6042510 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>@@ -14,5 +14,11 @@ Property values requiring vendor prefixes:
> None
> ------------------------------------------------------------------------
> List of files:
>-/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute.html
>-/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-iframed.sub.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-display-none.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-quirks-mode.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-standards-mode.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-width-1000px.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-001-expected.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-001.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-002-expected.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-dynamic-002.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/srcset-media-dynamic.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/srcset-media-dynamic.html
>new file mode 100644
>index 00000000000..2cc74e2b8f4
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/srcset-media-dynamic.html
>@@ -0,0 +1,25 @@
>+<!doctype html>
>+<title>source element in picture handles dynamic media change correctly.</title>
>+<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Ãlvarez">
>+<link rel="author" href="https://mozilla.org" title="Mozilla">
>+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1523627">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<picture id="pic">
>+  <source srcset="data:,a">
>+</picture>
>+<script>
>+let t = async_test("Dynamic media change is handled correctly");
>+
>+let pic = document.getElementById("pic");
>+// Something that will never match.
>+pic.querySelector("source").setAttribute("media", "not all");
>+
>+let img = document.createElement("img");
>+img.src = "data:,b";
>+pic.appendChild(img);
>+
>+onload = t.step_func_done(function() {
>+  assert_equals(img.currentSrc, "data:,b");
>+});
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/w3c-import.log
>index 8d8b1d94d79..fe5a97711dd 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>@@ -17,3 +17,4 @@ List of files:
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/common.js
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/parse-a-srcset-attribute.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/select-an-image-source.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/srcset/srcset-media-dynamic.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-the-image-data/fail-to-resolve.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-the-image-data/fail-to-resolve.html
>new file mode 100644
>index 00000000000..959ceaa9793
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-the-image-data/fail-to-resolve.html
>@@ -0,0 +1,25 @@
>+<!doctype html>
>+<title>img update the image data: fail to resolve URL</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<div id=log></div>
>+
>+<img src="//[">
>+<img srcset="//[">
>+<img srcset="//[" src="/images/red.png">
>+<img srcset="//[, /images/red.png">
>+
>+<script>
>+setup({explicit_done: true});
>+
>+var expected = '//[';
>+
>+onload = function() {
>+  [].forEach.call(document.images, function(img) {
>+    test(function() {
>+      assert_equals(img.currentSrc, expected);
>+    }, img.outerHTML);
>+  });
>+  done();
>+};
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-the-image-data/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-the-image-data/w3c-import.log
>new file mode 100644
>index 00000000000..b8fc42326e0
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-the-image-data/w3c-import.log
>@@ -0,0 +1,17 @@
>+The tests in this directory were imported from the W3C repository.
>+Do NOT modify these tests directly in WebKit.
>+Instead, create a pull request on the WPT github:
>+	https://github.com/web-platform-tests/wpt
>+
>+Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
>+
>+Do NOT modify or remove this file.
>+
>+------------------------------------------------------------------------
>+Properties requiring vendor prefixes:
>+None
>+Property values requiring vendor prefixes:
>+None
>+------------------------------------------------------------------------
>+List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-the-image-data/fail-to-resolve.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/w3c-import.log
>index 8711f70d920..9c21010cc2b 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>@@ -15,8 +15,13 @@ None
> ------------------------------------------------------------------------
> List of files:
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/3.jpg
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/404-response-with-actual-image-data.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/404-response-with-actual-image-data.py
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/Image-constructor.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/adoption.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images-expected.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images-onload.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/available-images.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/brokenimg.jpg
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/contains.json
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/data-url.html
>@@ -33,6 +38,8 @@ List of files:
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/non-active-document.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/nonexistent-image.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/not-rendered-dimension-getter.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/null-image-source.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-media.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-src-complete.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/update-the-source-set.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/document-getters-return-null-for-cross-origin.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/document-getters-return-null-for-cross-origin.html
>new file mode 100644
>index 00000000000..3d1077538e2
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/document-getters-return-null-for-cross-origin.html
>@@ -0,0 +1,17 @@
>+<!DOCTYPE html>
>+<meta charset=utf-8>
>+<title>Test that contentDocument/getSVGDocument() return null for a cross-origin document.</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<body>
>+<object data='data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><rect height="100" width="100"/></svg>'></object>
>+<script>
>+const object = document.querySelector('object');
>+var t1 = async_test('HTMLObjectElement.contentDocument for cross-origin document');
>+window.addEventListener(
>+    'load', t1.step_func_done(() => { assert_equals(object.contentDocument, null); }));
>+var t2 = async_test('HTMLObjectElement.getSVGDocument() for cross-origin document');
>+window.addEventListener(
>+    'load', t2.step_func_done(() => { assert_equals(object.getSVGDocument(), null); }));
>+</script>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-events.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-events.html
>new file mode 100644
>index 00000000000..4ead6f56b19
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-events.html
>@@ -0,0 +1,80 @@
>+<!DOCTYPE html>
>+<meta charset="utf-8">
>+<title>HTML Test: object-events</title>
>+<link rel="author" title="Intel" href="http://www.intel.com">
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<div id="log"></div>
>+<script>
>+
>+async_test(function(t) {
>+  var obj = document.createElement("object");
>+  obj.onerror = t.step_func_done(function(e){
>+    assert_equals(Object.getPrototypeOf(e).constructor, Event, "The error event should use the Event interface.");
>+    assert_true(e.isTrusted, "The error event should be a trusted event.");
>+    assert_false(e.cancelable, "The error event should not be a cancelable event.");
>+    assert_false(e.bubbles, "The error event should not be a bubble event.");
>+    assert_equals(e.target, obj, "The error event target should be the corresponding object element.");
>+  });
>+
>+  obj.onload = t.step_func_done(function(e){
>+    assert_unreached("The load event should not be fired.");
>+  });
>+
>+  obj.data = "file:\\http://nonexistent.html";
>+  document.body.appendChild(obj);
>+}, "error event (using 'file:' protocol)");
>+
>+async_test(function(t) {
>+  var obj = document.createElement("object");
>+  obj.onerror = t.step_func_done(function(e){
>+    assert_equals(e.target, obj,
>+                  "The error event should be fired on our element");
>+  });
>+  obj.onload = t.step_func_done(function(e){
>+    assert_unreached("The load event should not be fired.");
>+  });
>+
>+  obj.data = "http://test:test";
>+  document.body.appendChild(obj);
>+}, "error event (using 'http:' protocol)");
>+
>+
>+async_test(function(t) {
>+  var obj = document.createElement("object");
>+  obj.onload = t.step_func_done(function(e){
>+    assert_equals(Object.getPrototypeOf(e).constructor, Event, "The load event should use the Event interface.");
>+    assert_true(e.isTrusted, "The load event should be a trusted event.");
>+    assert_false(e.cancelable, "The load event should not be a cancelable event.");
>+    assert_false(e.bubbles, "The load event should not be a bubble event.");
>+    assert_equals(e.target, obj, "The load event target should be the corresponding object element.");
>+  });
>+
>+  obj.onerror = t.step_func_done(function(e){
>+    assert_unreached("The error event should not be fired.");
>+  });
>+
>+  obj.data = "/images/blue.png";
>+  document.body.appendChild(obj);
>+}, "load event");
>+
>+async_test(function(t) {
>+  var obj = document.createElement("object");
>+  obj.onload = t.step_func_done(function(e){
>+    assert_true(obj.contentWindow instanceof Window, "The object element should represent a nested browsing context.")
>+    assert_equals(Object.getPrototypeOf(e).constructor, Event, "The load event should use the Event interface.");
>+    assert_true(e.isTrusted, "The load event should be a trusted event.");
>+    assert_false(e.cancelable, "The load event should not be a cancelable event.");
>+    assert_false(e.bubbles, "The load event should not be a bubble event.");
>+    assert_equals(e.target, obj, "The load event target should be the corresponding object element.");
>+  });
>+
>+  obj.onerror = t.step_func_done(function(e){
>+    assert_unreached("The error event should not be fired.");
>+  });
>+
>+  obj.data = "about:blank";
>+  document.body.appendChild(obj);
>+}, "load event of about:blank");
>+
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-fallback-failed-cross-origin-navigation.sub.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-fallback-failed-cross-origin-navigation.sub.html
>new file mode 100644
>index 00000000000..d2190cc7af8
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-fallback-failed-cross-origin-navigation.sub.html
>@@ -0,0 +1,52 @@
>+n<!DOCTYPE html>
>+<meta charset=utf-8>
>+<title>Test that &lt;object&gt; renders its own fallback.</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<body>
>+<script>
>+  // The host exists but the resource is unavailable.
>+  const cross_origin_url_a = "http://{{hosts[alt][www]}}:{{ports[http][0]}}/foo.html";
>+  // The destination does not even exist and the navigation fails.
>+  const cross_origin_url_b = "http://{{hosts[alt][nonexistent]}}:{{ports[http][0]}}/foo.html";
>+
>+  // Returns a promise which is resolved when |callback| returns true. The |callback| is invoked at
>+  // every animation frame.
>+  function for_each_animation_frame(callback) {
>+    return new Promise((resolve) => {
>+      function on_raf() {
>+        if (!callback())
>+          resolve();
>+        window.requestAnimationFrame(on_raf);
>+      }
>+      window.requestAnimationFrame(on_raf);
>+    });
>+  }
>+
>+  // Create an <object> with some fallback content.
>+  function create_object_with_fallback(url) {
>+    var object = document.createElement("object");
>+    var fallback = document.createElement("button");
>+    fallback.textContent = "FALLBACK CONTENT";
>+    object.appendChild(fallback);
>+    object.data = url;
>+    object.type = "text/html";
>+    document.body.appendChild(object);
>+    return object;
>+  }
>+
>+  function area(el) {
>+    let bounds = el.getBoundingClientRect();
>+    return el.width * el.height;
>+  }
>+
>+  promise_test(async() => {
>+    var object = create_object_with_fallback(cross_origin_url_a);
>+    await for_each_animation_frame(() => area(object.firstChild) > 0);
>+    object.parentElement.removeChild(object);
>+    object = create_object_with_fallback(cross_origin_url_b);
>+    await for_each_animation_frame(() => area(object.firstChild) > 0);
>+    object.parentElement.removeChild(object);
>+  }, "Verify fallback content for failed cross-origin navigations is shown correctly.");
>+</script>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-setcustomvalidity.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-setcustomvalidity.html
>new file mode 100644
>index 00000000000..44574ffd11f
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-setcustomvalidity.html
>@@ -0,0 +1,17 @@
>+<!DOCTYPE HTML>
>+<title>object setCustomValidity</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+
>+<object id='object_test'></object>
>+
>+<script>
>+
>+test(() => {
>+  let elem = document.getElementById("object_test");
>+  assert_false(elem.validity.customError);
>+  elem.setCustomValidity("custom error");
>+  assert_true(elem.validity.customError);
>+}, "object setCustomValidity is correct")
>+
>+</script>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/w3c-import.log
>index 7060c83ec8d..ec07521bf0d 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>@@ -14,12 +14,16 @@ Property values requiring vendor prefixes:
> None
> ------------------------------------------------------------------------
> List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/document-getters-return-null-for-cross-origin.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/historical.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-attributes.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-events.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-fallback-failed-cross-origin-navigation.sub.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-fallback.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-handler.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-ignored-in-media-element.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-in-object-fallback-2.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/object-setcustomvalidity.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/test0.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/test1.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-object-element/test2.html
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsic_sizes.htm b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsic_sizes.htm
>new file mode 100644
>index 00000000000..7819ee1c189
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsic_sizes.htm
>@@ -0,0 +1,75 @@
>+<!doctype html>
>+<html>
>+<head>
>+<title>video element - intrinsic sizes</title>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<script src="/common/media.js"></script>
>+</head>
>+<body>
>+<p><a href="https://html.spec.whatwg.org/multipage/#the-video-element">spec reference</a></p>
>+<video id="v1"></video>
>+<video id="v2" width="400"></video>
>+<video id="v3" height="100"></video>
>+<video id="v4"></video>
>+<video id="v5" poster="/media/poster.png"></video>
>+<div id="log"></div>
>+<script>
>+test(function() {
>+  var s = getComputedStyle(document.getElementById("v1"));
>+  assert_equals(s.width, "300px");
>+  assert_equals(s.height, "150px");
>+}, "default object size is 300x150");
>+
>+test(function() {
>+  var s = getComputedStyle(document.getElementById("v2"));
>+  assert_equals(s.width, "400px");
>+  assert_equals(s.height, "200px");
>+}, "default height is half the width");
>+
>+test(function() {
>+  var s = getComputedStyle(document.getElementById("v3"));
>+  assert_equals(s.width, "200px");
>+  assert_equals(s.height, "100px");
>+}, "default width is twice the height");
>+
>+async_test(function(t) {
>+  var v = document.getElementById("v4");
>+  var s = getComputedStyle(v);
>+  v.src = getVideoURI("/media/movie_5") + "?" + new Date() + Math.random();
>+  v.onerror = t.unreached_func();
>+  v.onloadedmetadata = t.step_func(function() {
>+    assert_equals(s.width, '320px');
>+    assert_equals(s.height, '240px');
>+    v.removeAttribute("src");
>+    v.load();
>+    // Dimensions should be updated only on next layout.
>+    assert_equals(s.width, '320px');
>+    assert_equals(s.height, '240px');
>+    requestAnimationFrame(t.step_func_done(function() {
>+      assert_equals(s.width, "300px");
>+      assert_equals(s.height, "150px");
>+    }));
>+  });
>+}, "default object size after src is removed");
>+
>+async_test(function(t) {
>+  var v = document.getElementById("v5");
>+  var s = getComputedStyle(v);
>+  v.onerror = t.unreached_func();
>+  onload = t.step_func(function() {
>+    assert_equals(s.width, '102px');
>+    assert_equals(s.height, '77px');
>+    v.removeAttribute("poster");
>+    // Dimensions should be updated only on next layout.
>+    assert_equals(s.width, '102px');
>+    assert_equals(s.height, '77px');
>+    requestAnimationFrame(t.step_func_done(function() {
>+      assert_equals(s.width, "300px");
>+      assert_equals(s.height, "150px");
>+    }));
>+  });
>+}, "default object size after poster is removed");
>+</script>
>+</body>
>+</html>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html
>new file mode 100644
>index 00000000000..d749d5576e6
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html
>@@ -0,0 +1,39 @@
>+<!DOCTYPE html>
>+<body>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<script>
>+'use strict';
>+
>+promise_test(async() => {
>+  var video = document.createElement('video');
>+  document.body.appendChild(video);
>+  video.src = "/images/pattern.ogv";
>+  await new Promise(resolve =>
>+    video.addEventListener('canplaythrough', () => resolve(), {once: true}));
>+  video.intrinsicSize = '400 x 500';
>+  assert_equals(video.getBoundingClientRect().width, 400, 'width');
>+  assert_equals(video.getBoundingClientRect().height, 500, 'height');
>+  assert_equals(video.videoWidth, 400, 'naturalWidth');
>+  assert_equals(video.videoHeight, 500, 'naturalHeight');
>+
>+  video.width = '800';
>+  assert_equals(video.getBoundingClientRect().width, 800, 'width');
>+  assert_equals(video.getBoundingClientRect().height, 1000, 'height');
>+  assert_equals(video.videoWidth, 400, 'naturalWidth');
>+  assert_equals(video.videoHeight, 500, 'naturalHeight');
>+
>+  video.style = 'height:800px;';
>+  assert_equals(video.getBoundingClientRect().width, 800, 'width');
>+  assert_equals(video.getBoundingClientRect().height, 800, 'height');
>+  assert_equals(video.videoWidth, 400, 'naturalWidth');
>+  assert_equals(video.videoHeight, 500, 'naturalHeight');
>+
>+  video.removeAttribute('width');
>+  assert_equals(video.getBoundingClientRect().width, 640, 'width');
>+  assert_equals(video.getBoundingClientRect().height, 800, 'height');
>+  assert_equals(video.videoWidth, 400, 'naturalWidth');
>+  assert_equals(video.videoHeight, 500, 'naturalHeight');
>+}, 'Test intrinsicsize for html video element');
>+</script>
>+</body>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html.headers b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html.headers
>new file mode 100644
>index 00000000000..4fbf3f5addd
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html.headers
>@@ -0,0 +1 @@
>+Feature-Policy: unsized-media *
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/w3c-import.log
>new file mode 100644
>index 00000000000..4382b6966a1
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/w3c-import.log
>@@ -0,0 +1,18 @@
>+The tests in this directory were imported from the W3C repository.
>+Do NOT modify these tests directly in WebKit.
>+Instead, create a pull request on the WPT github:
>+	https://github.com/web-platform-tests/wpt
>+
>+Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
>+
>+Do NOT modify or remove this file.
>+
>+------------------------------------------------------------------------
>+Properties requiring vendor prefixes:
>+None
>+Property values requiring vendor prefixes:
>+None
>+------------------------------------------------------------------------
>+List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsicsize/intrinsicsize-without-unsized-media.tentative.https.sub.html.headers
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/w3c-import.log
>index 8acec4f935f..011a541220f 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/w3c-import.log
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/w3c-import.log
>@@ -1,7 +1,7 @@
> The tests in this directory were imported from the W3C repository.
> Do NOT modify these tests directly in WebKit.
> Instead, create a pull request on the WPT github:
>-	https://github.com/w3c/web-platform-tests
>+	https://github.com/web-platform-tests/wpt
> 
> Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
> 
>@@ -14,6 +14,7 @@ Property values requiring vendor prefixes:
> None
> ------------------------------------------------------------------------
> List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/intrinsic_sizes.htm
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/video-tabindex.html
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/video_content_image-expected.htm
> /LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-video-element/video_content_image.htm
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/w3c-import.log
>new file mode 100644
>index 00000000000..25f98a029d6
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/w3c-import.log
>@@ -0,0 +1,17 @@
>+The tests in this directory were imported from the W3C repository.
>+Do NOT modify these tests directly in WebKit.
>+Instead, create a pull request on the WPT github:
>+	https://github.com/web-platform-tests/wpt
>+
>+Then run the Tools/Scripts/import-w3c-tests in WebKit to reimport
>+
>+Do NOT modify or remove this file.
>+
>+------------------------------------------------------------------------
>+Properties requiring vendor prefixes:
>+None
>+Property values requiring vendor prefixes:
>+None
>+------------------------------------------------------------------------
>+List of files:
>+/LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/META.yml
>diff --git a/LayoutTests/platform/mac-wk1/TestExpectations b/LayoutTests/platform/mac-wk1/TestExpectations
>index 4b593ddf512..fce9a1f5457 100644
>--- a/LayoutTests/platform/mac-wk1/TestExpectations
>+++ b/LayoutTests/platform/mac-wk1/TestExpectations
>@@ -349,8 +349,6 @@ fast/dom/HTMLAnchorElement/anchor-file-blob-convert-to-download.html [ Skip ]
> fast/dom/HTMLAnchorElement/anchor-file-blob-convert-to-download-async-delegate.html [ Skip ]
> http/tests/download/convert-cached-load-to-download.html [ Skip ]
> 
>-webkit.org/b/156629 imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute.html [ Pass Failure ]
>-
> webkit.org/b/157007 fast/layers/no-clipping-overflow-hidden-added-after-transform.html [ Pass ImageOnlyFailure ]
> webkit.org/b/157007 legacy-animation-engine/fast/layers/no-clipping-overflow-hidden-added-after-transform.html [ Pass ImageOnlyFailure ]
> 
>diff --git a/LayoutTests/tests-options.json b/LayoutTests/tests-options.json
>index 42bfbae47a9..a3cde880037 100644
>--- a/LayoutTests/tests-options.json
>+++ b/LayoutTests/tests-options.json
>@@ -1274,9 +1274,24 @@
>     "imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-iframe.html": [
>         "slow"
>     ],
>+    "imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes-svg.tentative.html": [
>+        "slow"
>+    ],
>     "imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-path-changes.html": [
>         "slow"
>     ],
>+    "imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-picture.html": [
>+        "slow"
>+    ],
>+    "imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-svg.tentative.html": [
>+        "slow"
>+    ],
>+    "imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach-svg.tentative.html": [
>+        "slow"
>+    ],
>+    "imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode-with-quick-attach.html": [
>+        "slow"
>+    ],
>     "imported/w3c/web-platform-tests/html/semantics/embedded-content/the-img-element/decode/image-decode.html": [
>         "slow"
>     ],
>-- 
>2.20.1
>

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Attachments on bug 194770: 362269 | 362272 | 362274 | 362280 | 362284 | 362285 | 362286 | 362292 | 363091 | 363742 | 363749 | 363754 | 363774