Attachment 231454 Details for Bug 132895 – Patch

[patch] Patch

bug-132895-20140514080344.patch (text/plain), 128.45 KB, created by alan on 2014-05-14 08:04:08 PDT

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Creator: alan

Created: 2014-05-14 08:04:08 PDT

Size: 128.45 KB

patch

obsolete

>Subversion Revision: 168835
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 5aba34d8ecca302e9dc63119ee16e38a1601579b..215c796b7302b9e0212f0d0b59c2a81b37a7f55a 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,58 @@
>+2014-05-14  Zalan Bujtas  <zalan@apple.com>
>+
>+        Subpixel layout: Change Element.offset* client* scroll* return type to double.
>+        https://bugs.webkit.org/show_bug.cgi?id=132895
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        This patch changes Element.offset*, Element.client* and Element.scroll* APIs return
>+        type from long to double to match the latest CSSOM View Module spec[1].
>+        Element.offset* and Element.client* do return subpixel values from now on.
>+        Element.scroll* still return integral values as the scrolling code hasn't adopted to subpixel rendering yet.
>+
>+        subpixelCSSOMElementMetricsEnabled setting is added to be able to turn this feature on/off
>+        from Safari's debug menu. It toggles the return value from subpixel to floored integral.
>+        It does not change layout/rendering behavior.
>+
>+        Reference list of what other browsers do:
>+        IE: http://blogs.msdn.com/b/ie/archive/2012/02/17/sub-pixel-rendering-and-the-css-object-model.aspx
>+        Blink: http://www.chromestatus.com/features/5497402177880064
>+        Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=825607
>+
>+        [1] http://www.w3.org/TR/2013/WD-cssom-view-20131217/
>+
>+        Test: cssom/subpixel-offsetleft-top-width-height-values.html
>+
>+        * dom/Element.cpp:
>+        (WebCore::adjustForLocalZoom):
>+        (WebCore::convertToNonSubpixelValueIfNeeded):
>+        (WebCore::Element::offsetLeft):
>+        (WebCore::Element::offsetTop):
>+        (WebCore::Element::offsetWidth):
>+        (WebCore::Element::offsetHeight):
>+        (WebCore::Element::clientLeft):
>+        (WebCore::Element::clientTop):
>+        (WebCore::Element::clientWidth):
>+        (WebCore::Element::clientHeight):
>+        (WebCore::Element::scrollLeft):
>+        (WebCore::Element::scrollTop):
>+        (WebCore::Element::setScrollLeft):
>+        (WebCore::Element::setScrollTop):
>+        (WebCore::Element::scrollWidth):
>+        (WebCore::Element::scrollHeight):
>+        * dom/Element.h:
>+        * dom/Element.idl:
>+        * html/HTMLBodyElement.cpp:
>+        (WebCore::adjustForZoom):
>+        (WebCore::HTMLBodyElement::scrollLeft):
>+        (WebCore::HTMLBodyElement::setScrollLeft):
>+        (WebCore::HTMLBodyElement::scrollTop):
>+        (WebCore::HTMLBodyElement::setScrollTop):
>+        (WebCore::HTMLBodyElement::scrollHeight):
>+        (WebCore::HTMLBodyElement::scrollWidth):
>+        * html/HTMLBodyElement.h:
>+        * page/Settings.in:
>+
> 2014-05-14  Antti Koivisto  <antti@apple.com>
> 
>         RuleData should ref the StyleRule
>diff --git a/Source/WebKit2/ChangeLog b/Source/WebKit2/ChangeLog
>index 21404b2c422d1cebd10a04b734e35724f46012b5..685162945357b7d9082e45e834944af4ae7557e2 100644
>--- a/Source/WebKit2/ChangeLog
>+++ b/Source/WebKit2/ChangeLog
>@@ -1,3 +1,34 @@
>+2014-05-14  Zalan Bujtas  <zalan@apple.com>
>+
>+        Subpixel layout: Change Element.offset* client* scroll* return type to double.
>+        https://bugs.webkit.org/show_bug.cgi?id=132895
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        This patch changes Element.offset*, Element.client* and Element.scroll* APIs return
>+        type from long to double to match the latest CSSOM View Module spec[1].
>+        Element.offset* and Element.client* do return subpixel values from now on.
>+        Element.scroll* still return integral values as the scrolling code hasn't adopted to subpixel rendering yet.
>+
>+        subpixelCSSOMElementMetricsEnabled setting is added to be able to turn this feature on/off
>+        from Safari's debug menu. It toggles the return value from subpixel to floored integral.
>+        It does not change layout/rendering behavior.
>+
>+        Reference list of what other browsers do:
>+        IE: http://blogs.msdn.com/b/ie/archive/2012/02/17/sub-pixel-rendering-and-the-css-object-model.aspx
>+        Blink: http://www.chromestatus.com/features/5497402177880064
>+        Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=825607
>+
>+        [1] http://www.w3.org/TR/2013/WD-cssom-view-20131217/
>+
>+        * Shared/WebPreferencesStore.h:
>+        * UIProcess/API/C/WKPreferences.cpp:
>+        (WKPreferencesSetSubpixelCSSOMElementMetricsEnabled):
>+        (WKPreferencesGetSubpixelCSSOMElementMetricsEnabled):
>+        * UIProcess/API/C/WKPreferencesRefPrivate.h:
>+        * WebProcess/WebPage/WebPage.cpp:
>+        (WebKit::WebPage::updatePreferences):
>+
> 2014-05-13  Gyuyoung Kim  <gyuyoung.kim@samsung.com>
> 
>         [EFL][WK2] Add ewk_view_fixed_layout_size_set|get()
>diff --git a/Source/WebCore/dom/Element.cpp b/Source/WebCore/dom/Element.cpp
>index 049fb4a5ad95f0facf65a78034857b3728a8d86d..9db725bbac02f0c4079c65ad4193a8f634ed6511 100644
>--- a/Source/WebCore/dom/Element.cpp
>+++ b/Source/WebCore/dom/Element.cpp
>@@ -621,16 +621,16 @@ void Element::scrollByPages(int pages)
>     scrollByUnits(pages, ScrollByPage);
> }
> 
>-static float localZoomForRenderer(RenderElement* renderer)
>+static float localZoomForRenderer(const RenderElement& renderer)
> {
>     // FIXME: This does the wrong thing if two opposing zooms are in effect and canceled each
>     // other out, but the alternative is that we'd have to crawl up the whole render tree every
>     // time (or store an additional bit in the RenderStyle to indicate that a zoom was specified).
>     float zoomFactor = 1;
>-    if (renderer->style().effectiveZoom() != 1) {
>+    if (renderer.style().effectiveZoom() != 1) {
>         // Need to find the nearest enclosing RenderElement that set up
>         // a differing zoom, and then we divide our result by it to eliminate the zoom.
>-        RenderElement* prev = renderer;
>+        const RenderElement* prev = &renderer;
>         for (RenderElement* curr = prev->parent(); curr; curr = curr->parent()) {
>             if (curr->style().effectiveZoom() != prev->style().effectiveZoom()) {
>                 zoomFactor = prev->style().zoom();
>@@ -644,57 +644,63 @@ static float localZoomForRenderer(RenderElement* renderer)
>     return zoomFactor;
> }
> 
>-static int adjustForLocalZoom(LayoutUnit value, RenderElement* renderer)
>+static double adjustForLocalZoom(LayoutUnit value, const RenderElement& renderer)
> {
>     float zoomFactor = localZoomForRenderer(renderer);
>     if (zoomFactor == 1)
>-        return value;
>+        return value.toDouble();
> #if ENABLE(SUBPIXEL_LAYOUT)
>-    return lroundf(value / zoomFactor);
>+    return value.toDouble() / zoomFactor;
> #else
>     // Needed because computeLengthInt truncates (rather than rounds) when scaling up.
>     if (zoomFactor > 1)
>         ++value;
>-    return static_cast<int>(value / zoomFactor);
>+    return value.toDouble() / zoomFactor;
> #endif
> }
> 
>-int Element::offsetLeft()
>+static double convertToNonSubpixelValueIfNeeded(double value, const Document& document)
>+{
>+    return document.settings() && !document.settings()->subpixelCSSOMElementMetricsEnabled() ? floor(value) : value;
>+}
>+
>+double Element::offsetLeft()
> {
>     document().updateLayoutIgnorePendingStylesheets();
>     if (RenderBoxModelObject* renderer = renderBoxModelObject())
>-        return adjustForLocalZoom(renderer->pixelSnappedOffsetLeft(), renderer);
>+        return convertToNonSubpixelValueIfNeeded(adjustForLocalZoom(renderer->offsetLeft(), *renderer), renderer->document());
>     return 0;
> }
> 
>-int Element::offsetTop()
>+double Element::offsetTop()
> {
>     document().updateLayoutIgnorePendingStylesheets();
>     if (RenderBoxModelObject* renderer = renderBoxModelObject())
>-        return adjustForLocalZoom(renderer->pixelSnappedOffsetTop(), renderer);
>+        return convertToNonSubpixelValueIfNeeded(adjustForLocalZoom(renderer->offsetTop(), *renderer), renderer->document());
>     return 0;
> }
> 
>-int Element::offsetWidth()
>+double Element::offsetWidth()
> {
>     document().updateLayoutIgnorePendingStylesheets();
>-    if (RenderBoxModelObject* renderer = renderBoxModelObject())
>+    if (RenderBoxModelObject* renderer = renderBoxModelObject()) {
> #if ENABLE(SUBPIXEL_LAYOUT)
>-        return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedOffsetWidth(), *renderer).round();
>+        return convertToNonSubpixelValueIfNeeded(adjustLayoutUnitForAbsoluteZoom(renderer->offsetWidth(), *renderer).toDouble(), renderer->document());
> #else
>-        return adjustForAbsoluteZoom(renderer->pixelSnappedOffsetWidth(), *renderer);
>+        return adjustForAbsoluteZoom(renderer->offsetWidth(), *renderer);
> #endif
>+    }
>     return 0;
> }
> 
>-int Element::offsetHeight()
>+double Element::offsetHeight()
> {
>     document().updateLayoutIgnorePendingStylesheets();
>     if (RenderBoxModelObject* renderer = renderBoxModelObject())
> #if ENABLE(SUBPIXEL_LAYOUT)
>-        return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedOffsetHeight(), *renderer).round();
>+        return convertToNonSubpixelValueIfNeeded(adjustLayoutUnitForAbsoluteZoom(renderer->offsetHeight(), *renderer).toDouble(), renderer->document());
> #else
>-        return adjustForAbsoluteZoom(renderer->pixelSnappedOffsetHeight(), *renderer);
>+        return adjustForAbsoluteZoom(renderer->offsetHeight(), *renderer);
> #endif
>     return 0;
> }
>@@ -719,25 +725,33 @@ Element* Element::offsetParent()
>     return offsetParent->element();
> }
> 
>-int Element::clientLeft()
>+double Element::clientLeft()
> {
>     document().updateLayoutIgnorePendingStylesheets();
> 
>     if (RenderBox* renderer = renderBox())
>-        return adjustForAbsoluteZoom(roundToInt(renderer->clientLeft()), *renderer);
>+#if ENABLE(SUBPIXEL_LAYOUT)
>+        return convertToNonSubpixelValueIfNeeded(adjustLayoutUnitForAbsoluteZoom(renderer->clientLeft(), *renderer).toDouble(), renderer->document());
>+#else
>+        return adjustForAbsoluteZoom(renderer->clientLeft(), *renderer);
>+#endif
>     return 0;
> }
> 
>-int Element::clientTop()
>+double Element::clientTop()
> {
>     document().updateLayoutIgnorePendingStylesheets();
> 
>     if (RenderBox* renderer = renderBox())
>-        return adjustForAbsoluteZoom(roundToInt(renderer->clientTop()), *renderer);
>+#if ENABLE(SUBPIXEL_LAYOUT)
>+        return convertToNonSubpixelValueIfNeeded(adjustLayoutUnitForAbsoluteZoom(renderer->clientTop(), *renderer).toDouble(), renderer->document());
>+#else
>+        return adjustForAbsoluteZoom(renderer->clientTop(), *renderer);
>+#endif
>     return 0;
> }
> 
>-int Element::clientWidth()
>+double Element::clientWidth()
> {
>     document().updateLayoutIgnorePendingStylesheets();
> 
>@@ -753,14 +767,14 @@ int Element::clientWidth()
>     
>     if (RenderBox* renderer = renderBox())
> #if ENABLE(SUBPIXEL_LAYOUT)
>-        return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedClientWidth(), *renderer).round();
>+        return convertToNonSubpixelValueIfNeeded(adjustLayoutUnitForAbsoluteZoom(renderer->clientWidth(), *renderer).toDouble(), renderer->document());
> #else
>-        return adjustForAbsoluteZoom(renderer->pixelSnappedClientWidth(), *renderer);
>+        return adjustForAbsoluteZoom(renderer->clientWidth(), *renderer);
> #endif
>     return 0;
> }
> 
>-int Element::clientHeight()
>+double Element::clientHeight()
> {
>     document().updateLayoutIgnorePendingStylesheets();
> 
>@@ -776,14 +790,14 @@ int Element::clientHeight()
> 
>     if (RenderBox* renderer = renderBox())
> #if ENABLE(SUBPIXEL_LAYOUT)
>-        return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedClientHeight(), *renderer).round();
>+        return convertToNonSubpixelValueIfNeeded(adjustLayoutUnitForAbsoluteZoom(renderer->clientHeight(), *renderer).toDouble(), renderer->document());
> #else
>-        return adjustForAbsoluteZoom(renderer->pixelSnappedClientHeight(), *renderer);
>+        return adjustForAbsoluteZoom(renderer->clientHeight(), *renderer);
> #endif
>     return 0;
> }
> 
>-int Element::scrollLeft()
>+double Element::scrollLeft()
> {
>     document().updateLayoutIgnorePendingStylesheets();
> 
>@@ -792,7 +806,7 @@ int Element::scrollLeft()
>     return 0;
> }
> 
>-int Element::scrollTop()
>+double Element::scrollTop()
> {
>     document().updateLayoutIgnorePendingStylesheets();
> 
>@@ -801,29 +815,29 @@ int Element::scrollTop()
>     return 0;
> }
> 
>-void Element::setScrollLeft(int newLeft)
>+void Element::setScrollLeft(double newLeft)
> {
>     document().updateLayoutIgnorePendingStylesheets();
> 
>     if (RenderBox* renderer = renderBox()) {
>-        renderer->setScrollLeft(static_cast<int>(newLeft * renderer->style().effectiveZoom()));
>+        renderer->setScrollLeft(round(newLeft * renderer->style().effectiveZoom()));
>         if (auto* scrollableArea = renderer->layer())
>             scrollableArea->setScrolledProgrammatically(true);
>     }
> }
> 
>-void Element::setScrollTop(int newTop)
>+void Element::setScrollTop(double newTop)
> {
>     document().updateLayoutIgnorePendingStylesheets();
> 
>     if (RenderBox* renderer = renderBox()) {
>-        renderer->setScrollTop(static_cast<int>(newTop * renderer->style().effectiveZoom()));
>+        renderer->setScrollTop(round(newTop * renderer->style().effectiveZoom()));
>         if (auto* scrollableArea = renderer->layer())
>             scrollableArea->setScrolledProgrammatically(true);
>     }
> }
> 
>-int Element::scrollWidth()
>+double Element::scrollWidth()
> {
>     document().updateLayoutIgnorePendingStylesheets();
>     if (RenderBox* rend = renderBox())
>@@ -831,7 +845,7 @@ int Element::scrollWidth()
>     return 0;
> }
> 
>-int Element::scrollHeight()
>+double Element::scrollHeight()
> {
>     document().updateLayoutIgnorePendingStylesheets();
>     if (RenderBox* rend = renderBox())
>diff --git a/Source/WebCore/dom/Element.h b/Source/WebCore/dom/Element.h
>index 07ea6845f77d174f70443e08cb50ea27dd84b2f2..a4cee0163cf01311c986616ba5b9c702058e2523 100644
>--- a/Source/WebCore/dom/Element.h
>+++ b/Source/WebCore/dom/Element.h
>@@ -206,26 +206,26 @@ public:
>     void scrollByLines(int lines);
>     void scrollByPages(int pages);
> 
>-    int offsetLeft();
>-    int offsetTop();
>-    int offsetWidth();
>-    int offsetHeight();
>+    double offsetLeft();
>+    double offsetTop();
>+    double offsetWidth();
>+    double offsetHeight();
> 
>     // FIXME: Replace uses of offsetParent in the platform with calls
>     // to the render layer and merge bindingsOffsetParent and offsetParent.
>     Element* bindingsOffsetParent();
> 
>     Element* offsetParent();
>-    int clientLeft();
>-    int clientTop();
>-    int clientWidth();
>-    int clientHeight();
>-    virtual int scrollLeft();
>-    virtual int scrollTop();
>-    virtual void setScrollLeft(int);
>-    virtual void setScrollTop(int);
>-    virtual int scrollWidth();
>-    virtual int scrollHeight();
>+    double clientLeft();
>+    double clientTop();
>+    double clientWidth();
>+    double clientHeight();
>+    virtual double scrollLeft();
>+    virtual double scrollTop();
>+    virtual void setScrollLeft(double);
>+    virtual void setScrollTop(double);
>+    virtual double scrollWidth();
>+    virtual double scrollHeight();
> 
>     IntRect boundsInRootViewSpace();
> 
>diff --git a/Source/WebCore/dom/Element.idl b/Source/WebCore/dom/Element.idl
>index cf1d414f7ec5f1fa76aac042f6059eb0a0b87771..8bfb7b0c794e688e6afc79f7120de5d3946777de 100644
>--- a/Source/WebCore/dom/Element.idl
>+++ b/Source/WebCore/dom/Element.idl
>@@ -69,11 +69,11 @@
> 
>     // Common extensions
> 
>+#if defined(LANGUAGE_OBJECTIVE_C) && LANGUAGE_OBJECTIVE_C
>     readonly attribute long offsetLeft;
>     readonly attribute long offsetTop;
>     readonly attribute long offsetWidth;
>     readonly attribute long offsetHeight;
>-    [ImplementedAs=bindingsOffsetParent] readonly attribute Element offsetParent;
>     readonly attribute long clientLeft;
>     readonly attribute long clientTop;
>     readonly attribute long clientWidth;
>@@ -82,6 +82,22 @@
>     attribute long scrollTop;
>     readonly attribute long scrollWidth;
>     readonly attribute long scrollHeight;
>+#else
>+    readonly attribute double offsetLeft;
>+    readonly attribute double offsetTop;
>+    readonly attribute double offsetWidth;
>+    readonly attribute double offsetHeight;
>+    readonly attribute double clientLeft;
>+    readonly attribute double clientTop;
>+    readonly attribute double clientWidth;
>+    readonly attribute double clientHeight;
>+    attribute double scrollLeft;
>+    attribute double scrollTop;
>+    readonly attribute double scrollWidth;
>+    readonly attribute double scrollHeight;
>+#endif
>+
>+    [ImplementedAs=bindingsOffsetParent] readonly attribute Element offsetParent;
> 
>     void focus();
>     void blur();
>diff --git a/Source/WebCore/html/HTMLBodyElement.cpp b/Source/WebCore/html/HTMLBodyElement.cpp
>index d0412e611be966815cf5d6861926173c38fecd8d..c1bcfbcf5981deffc8e7108ffe87d7388e480dba 100644
>--- a/Source/WebCore/html/HTMLBodyElement.cpp
>+++ b/Source/WebCore/html/HTMLBodyElement.cpp
>@@ -198,18 +198,18 @@ bool HTMLBodyElement::supportsFocus() const
>     return hasEditableStyle() || HTMLElement::supportsFocus();
> }
> 
>-static int adjustForZoom(int value, Frame& frame)
>+static double adjustForZoom(int value, const Frame& frame)
> {
>-    float zoomFactor = frame.pageZoomFactor() * frame.frameScaleFactor();
>+    double zoomFactor = frame.pageZoomFactor() * frame.frameScaleFactor();
>     if (zoomFactor == 1)
>         return value;
>     // Needed because of truncation (rather than rounding) when scaling up.
>     if (zoomFactor > 1)
>         value++;
>-    return static_cast<int>(value / zoomFactor);
>+    return value / zoomFactor;
> }
> 
>-int HTMLBodyElement::scrollLeft()
>+double HTMLBodyElement::scrollLeft()
> {
>     document().updateLayoutIgnorePendingStylesheets();
>     Frame* frame = document().frame();
>@@ -218,10 +218,10 @@ int HTMLBodyElement::scrollLeft()
>     FrameView* view = frame->view();
>     if (!view)
>         return 0;
>-    return adjustForZoom(view->contentsScrollPosition().x(), *frame);
>+    return floor(adjustForZoom(view->contentsScrollPosition().x(), *frame));
> }
> 
>-void HTMLBodyElement::setScrollLeft(int scrollLeft)
>+void HTMLBodyElement::setScrollLeft(double scrollLeft)
> {
>     document().updateLayoutIgnorePendingStylesheets();
>     Frame* frame = document().frame();
>@@ -233,7 +233,7 @@ void HTMLBodyElement::setScrollLeft(int scrollLeft)
>     view->setScrollPosition(IntPoint(static_cast<int>(scrollLeft * frame->pageZoomFactor() * frame->frameScaleFactor()), view->scrollY()));
> }
> 
>-int HTMLBodyElement::scrollTop()
>+double HTMLBodyElement::scrollTop()
> {
>     document().updateLayoutIgnorePendingStylesheets();
>     Frame* frame = document().frame();
>@@ -242,10 +242,10 @@ int HTMLBodyElement::scrollTop()
>     FrameView* view = frame->view();
>     if (!view)
>         return 0;
>-    return adjustForZoom(view->contentsScrollPosition().y(), *frame);
>+    return floor(adjustForZoom(view->contentsScrollPosition().y(), *frame));
> }
> 
>-void HTMLBodyElement::setScrollTop(int scrollTop)
>+void HTMLBodyElement::setScrollTop(double scrollTop)
> {
>     document().updateLayoutIgnorePendingStylesheets();
>     Frame* frame = document().frame();
>@@ -257,7 +257,7 @@ void HTMLBodyElement::setScrollTop(int scrollTop)
>     view->setScrollPosition(IntPoint(view->scrollX(), static_cast<int>(scrollTop * frame->pageZoomFactor() * frame->frameScaleFactor())));
> }
> 
>-int HTMLBodyElement::scrollHeight()
>+double HTMLBodyElement::scrollHeight()
> {
>     // Update the document's layout.
>     document().updateLayoutIgnorePendingStylesheets();
>@@ -267,10 +267,10 @@ int HTMLBodyElement::scrollHeight()
>     FrameView* view = frame->view();
>     if (!view)
>         return 0;
>-    return adjustForZoom(view->contentsHeight(), *frame);
>+    return floor(adjustForZoom(view->contentsHeight(), *frame));
> }
> 
>-int HTMLBodyElement::scrollWidth()
>+double HTMLBodyElement::scrollWidth()
> {
>     // Update the document's layout.
>     document().updateLayoutIgnorePendingStylesheets();
>@@ -280,7 +280,7 @@ int HTMLBodyElement::scrollWidth()
>     FrameView* view = frame->view();
>     if (!view)
>         return 0;
>-    return adjustForZoom(view->contentsWidth(), *frame);
>+    return floor(adjustForZoom(view->contentsWidth(), *frame));
> }
> 
> void HTMLBodyElement::addSubresourceAttributeURLs(ListHashSet<URL>& urls) const
>diff --git a/Source/WebCore/html/HTMLBodyElement.h b/Source/WebCore/html/HTMLBodyElement.h
>index 440bd064fa1c18f3af242ded1f5a1c0e87fa9238..405a52e32d80d86a486d69a0d0f56990087c85db 100644
>--- a/Source/WebCore/html/HTMLBodyElement.h
>+++ b/Source/WebCore/html/HTMLBodyElement.h
>@@ -69,14 +69,14 @@ private:
>     
>     virtual bool supportsFocus() const override;
> 
>-    virtual int scrollLeft() override;
>-    virtual void setScrollLeft(int scrollLeft) override;
>+    virtual double scrollLeft() override;
>+    virtual void setScrollLeft(double) override;
>     
>-    virtual int scrollTop() override;
>-    virtual void setScrollTop(int scrollTop) override;
>+    virtual double scrollTop() override;
>+    virtual void setScrollTop(double) override;
>     
>-    virtual int scrollHeight() override;
>-    virtual int scrollWidth() override;
>+    virtual double scrollHeight() override;
>+    virtual double scrollWidth() override;
>     
>     virtual void addSubresourceAttributeURLs(ListHashSet<URL>&) const override;
> };
>diff --git a/Source/WebCore/page/Settings.in b/Source/WebCore/page/Settings.in
>index 2202e01192b4d9c06ab61d8f62cc36f941a2f15a..e3c79b2c00476cc735c65646b03987016280d880 100644
>--- a/Source/WebCore/page/Settings.in
>+++ b/Source/WebCore/page/Settings.in
>@@ -194,6 +194,8 @@ minimumZoomFontSize type=float, initial=15, conditional=IOS_TEXT_AUTOSIZING
> simpleLineLayoutEnabled initial=true, setNeedsStyleRecalcInAllFrames=1
> simpleLineLayoutDebugBordersEnabled initial=false, setNeedsStyleRecalcInAllFrames=1
> 
>+subpixelCSSOMElementMetricsEnabled initial=true
>+
> mediaSourceEnabled initial=true, conditional=MEDIA_SOURCE
> 
> # FIXME: Rename to allowMultiElementImplicitFormSubmission once we upstream the iOS changes to WebView.mm.
>diff --git a/Source/WebKit2/Shared/WebPreferencesStore.h b/Source/WebKit2/Shared/WebPreferencesStore.h
>index 32620ab1553a5718ff06442b81b02e7e6abe0d8b..fa08b005b0240aab0803efd0472b05eaba7dcc71 100644
>--- a/Source/WebKit2/Shared/WebPreferencesStore.h
>+++ b/Source/WebKit2/Shared/WebPreferencesStore.h
>@@ -203,6 +203,7 @@ namespace WebKit {
>     macro(ThreadedScrollingEnabled, threadedScrollingEnabled, Bool, bool, true) \
>     macro(SimpleLineLayoutEnabled, simpleLineLayoutEnabled, Bool, bool, true) \
>     macro(SimpleLineLayoutDebugBordersEnabled, simpleLineLayoutDebugBordersEnabled, Bool, bool, false) \
>+    macro(SubpixelCSSOMElementMetricsEnabled, subpixelCSSOMElementMetricsEnabled, Bool, bool, true) \
>     macro(BackgroundShouldExtendBeyondPage, backgroundShouldExtendBeyondPage, Bool, bool, false) \
>     macro(MediaStreamEnabled, mediaStreamEnabled, Bool, bool, false) \
>     macro(UseLegacyTextAlignPositionedElementBehavior, useLegacyTextAlignPositionedElementBehavior, Bool, bool, false) \
>diff --git a/Source/WebKit2/UIProcess/API/C/WKPreferences.cpp b/Source/WebKit2/UIProcess/API/C/WKPreferences.cpp
>index 6a3831ff5bdcbb6e8096e654476466831237dcf7..152a9e42659f5520ff72bd32e90d988441c1b5c9 100644
>--- a/Source/WebKit2/UIProcess/API/C/WKPreferences.cpp
>+++ b/Source/WebKit2/UIProcess/API/C/WKPreferences.cpp
>@@ -1186,6 +1186,16 @@ bool WKPreferencesGetSimpleLineLayoutDebugBordersEnabled(WKPreferencesRef prefer
>     return toImpl(preferencesRef)->simpleLineLayoutDebugBordersEnabled();
> }
> 
>+void WKPreferencesSetSubpixelCSSOMElementMetricsEnabled(WKPreferencesRef preferencesRef, bool flag)
>+{
>+    toImpl(preferencesRef)->setSubpixelCSSOMElementMetricsEnabled(flag);
>+}
>+
>+bool WKPreferencesGetSubpixelCSSOMElementMetricsEnabled(WKPreferencesRef preferencesRef)
>+{
>+    return toImpl(preferencesRef)->subpixelCSSOMElementMetricsEnabled();
>+}
>+
> void WKPreferencesSetMediaStreamEnabled(WKPreferencesRef preferencesRef, bool enabled)
> {
>     toImpl(preferencesRef)->setMediaStreamEnabled(enabled);
>diff --git a/Source/WebKit2/UIProcess/API/C/WKPreferencesRefPrivate.h b/Source/WebKit2/UIProcess/API/C/WKPreferencesRefPrivate.h
>index 3200cb285772600bc433763fca74a4d463961577..8ac69022b556cc8a1415e04bd06a0fafea297b80 100644
>--- a/Source/WebKit2/UIProcess/API/C/WKPreferencesRefPrivate.h
>+++ b/Source/WebKit2/UIProcess/API/C/WKPreferencesRefPrivate.h
>@@ -296,6 +296,10 @@ WK_EXPORT bool WKPreferencesGetSimpleLineLayoutEnabled(WKPreferencesRef);
> WK_EXPORT void WKPreferencesSetSimpleLineLayoutDebugBordersEnabled(WKPreferencesRef, bool);
> WK_EXPORT bool WKPreferencesGetSimpleLineLayoutDebugBordersEnabled(WKPreferencesRef);
> 
>+// Defaults to true.
>+WK_EXPORT void WKPreferencesSetSubpixelCSSOMElementMetricsEnabled(WKPreferencesRef, bool);
>+WK_EXPORT bool WKPreferencesGetSubpixelCSSOMElementMetricsEnabled(WKPreferencesRef);
>+
> WK_EXPORT void WKPreferencesResetTestRunnerOverrides(WKPreferencesRef preferencesRef);
> 
> // Defaults to false.
>diff --git a/Source/WebKit2/WebProcess/WebPage/WebPage.cpp b/Source/WebKit2/WebProcess/WebPage/WebPage.cpp
>index 87fb6e70df58973682955a0439a5d4a4590086d0..81073eb5661a34db43748426d198b7216ad4a9aa 100644
>--- a/Source/WebKit2/WebProcess/WebPage/WebPage.cpp
>+++ b/Source/WebKit2/WebProcess/WebPage/WebPage.cpp
>@@ -2688,6 +2688,8 @@ void WebPage::updatePreferences(const WebPreferencesStore& store)
>     settings.setSimpleLineLayoutEnabled(store.getBoolValueForKey(WebPreferencesKey::simpleLineLayoutEnabledKey()));
>     settings.setSimpleLineLayoutDebugBordersEnabled(store.getBoolValueForKey(WebPreferencesKey::simpleLineLayoutDebugBordersEnabledKey()));
> 
>+    settings.setSubpixelCSSOMElementMetricsEnabled(store.getBoolValueForKey(WebPreferencesKey::subpixelCSSOMElementMetricsEnabledKey()));
>+
>     settings.setUseLegacyTextAlignPositionedElementBehavior(store.getBoolValueForKey(WebPreferencesKey::useLegacyTextAlignPositionedElementBehaviorKey()));
> 
> #if ENABLE(MEDIA_SOURCE)
>diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
>index 18e779a733180abd8a24b6950cad421f0d5dfa62..25914fb12e4814a36dec6453689f83f64402c0e8 100644
>--- a/LayoutTests/ChangeLog
>+++ b/LayoutTests/ChangeLog
>@@ -1,3 +1,32 @@
>+2014-05-13  Zalan Bujtas  <zalan@apple.com>
>+
>+        Subpixel layout: Change Element.offset* client* scroll* return type to double.
>+        https://bugs.webkit.org/show_bug.cgi?id=132895
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Some test cases expect integral values, so the test content is updated accordingly.
>+        It mostly means adding Math.round() before comparing values in order to match pixelSnappedIntRect()
>+        functionality.
>+
>+        * css3/calc/simple-calcs-prefixed.html: changed file format from Windows to Unix.
>+        * css3/calc/simple-calcs.html: changed file format from Windows to Unix.
>+        * cssom/subpixel-offsetleft-top-width-height-values-expected.txt: Added.
>+        * cssom/subpixel-offsetleft-top-width-height-values.html: Added.
>+        * editing/selection/drag-start-event-client-x-y.html: use floor as we compare the return value to a truncated integer.
>+        * editing/selection/mixed-editability-10.html:
>+        * fast/css/zoom-in-length-round-trip.html:
>+        * fast/dom/non-numeric-values-numeric-parameters-expected.txt:
>+        * fast/dom/script-tests/non-numeric-values-numeric-parameters.js:
>+        * fast/forms/basic-buttons.html:
>+        * js/dom/dom-static-property-for-in-iteration-expected.txt:
>+        * platform/mac/fast/scrolling/scroll-div-latched-div.html:
>+        * platform/mac/fast/scrolling/scroll-div-latched-mainframe.html:
>+        * platform/mac/fast/scrolling/scroll-select-bottom-test.html:
>+        * platform/mac/fast/scrolling/scroll-select-latched-mainframe.html:
>+        * platform/mac/fast/scrolling/scroll-select-latched-select.html:
>+        * resources/check-layout.js:
>+
> 2014-05-13  Andrei Bucur  <abucur@adobe.com>
> 
>         [CSS Regions] Assertion failure in some cases with inline blocks
>diff --git a/LayoutTests/css3/calc/simple-calcs-prefixed.html b/LayoutTests/css3/calc/simple-calcs-prefixed.html
>index 335e3cac59630ce0dee6af1c879a1028e6e45f37..cb5559f4db769d47ec6a58291fec240d236227ad 100644
>--- a/LayoutTests/css3/calc/simple-calcs-prefixed.html
>+++ b/LayoutTests/css3/calc/simple-calcs-prefixed.html
>@@ -1,121 +1,121 @@
>-<!DOCTYPE HTML>
>-<style>
>-.width-test {
>-    height: 100px;
>-    width: 256px;
>-    background-color: red;
>-}
>-
>-.height-test {
>-    width: 100px;
>-    height: 50px;
>-    background-color: red;
>-}
>-</style>
>-
>-<p>
>-    This file tests legacy support for the -webkit prefixed version of calc (ie -webkit-calc()).
>-</p>
>-<p>
>-  All boxes below should be 100px * 100px and green.
>-</p>
>-
>-<div id="test">
>-<div style="width:100px; height:100px;">control</div>
>-<div class="width-test" style="width: -webkit-calc(50px + 50px);">50px + 50px</div>
>-<div class="width-test" style="width: -webkit-calc(150px - 50px);">150px - 50px</div>
>-<div class="width-test" style="width: -webkit-calc(50px  +  50px);">50px  +  50px (2 spaces around operator)</div>
>-<div class="width-test" style="width: -webkit-calc(150px  -  50px);">150px  - 50px (2 spaces around operator)</div>
>-<div class="width-test" style="width: -webkit-calc(50px*2);">50px*2</div>
>-<div class="width-test" style="width: -webkit-calc(50px *2);">50px *2</div>
>-<div class="width-test" style="width: -webkit-calc(50px* 2);">50px* 2</div>
>-<div class="width-test" style="width: -webkit-calc(200px/2);">200px/2</div>
>-<div class="width-test" style="width: -webkit-calc(200px /2);">200px /2</div>
>-<div class="width-test" style="width: -webkit-calc(200px/ 2);">200px/ 2</div>
>-<div class="width-test" style="width: -webkit-calc(50px*(2));">50px*(2)</div>
>-<div class="width-test" style="width: -webkit-calc(50px *(2));">50px *(2)</div>
>-<div class="width-test" style="width: -webkit-calc(50px* (2));">50px* (2)</div>
>-<div class="width-test" style="width: -webkit-calc(50px*(1 + 1));">50px*(1 + 1)</div>
>-<div class="width-test" style="width: -webkit-calc(50px*(12 - 10));">50px*(12 - 10)</div>
>-<div class="width-test" style="width: -webkit-calc(50px*(10 / 5));">50px*(10 / 5)</div>
>-<div class="width-test" style="width: -webkit-calc(10px* (5 * 2));">10px* (5 * 2)</div>
>-<div class="width-test" style="width: -webkit-calc(50px + 10px * 5);">50px + 10px * 5 (operation order)</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: -webkit-calc(100%/2);">100%/2 (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: -webkit-calc(100% + -100px);">100% + -100px (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: -webkit-calc(80% - 60px);">80% - 60px (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: -webkit-calc(300px - 100%);">300px - 100% (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: -webkit-calc(-100px + 100%);">-100px + 100% (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: -webkit-calc(20% + 30%);">20% + 30% (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: -webkit-calc(80% - 30%);">80% - 30% (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: -webkit-calc(10% * 5);">10% * 5 (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: -webkit-calc(5 * 10%);">5 * 10% (where 100% is 200px)</div>
>-</div>
>-<div class="width-test" style="width: -webkit-calc((100px));">(100px)</div>
>-<div class="width-test" style="width: -webkit-calc((50px + 50px));">(50px + 50px)</div>
>-<div class="width-test" style="width: -webkit-calc((50px) + 50px);">(50px) + 50px</div>
>-<div class="width-test" style="width: -webkit-calc(50px + (50px));">50px + (50px)</div>
>-<div class="width-test" style="width: -webkit-calc( 50px +  50px );"> 50px +  50px </div>
>-<div class="width-test" style="width: -webkit-calc( 50px + 25px * 2 );"> 50px + 25px * 2 </div>
>-<div class="width-test" style="width: -webkit-calc( (25px + 25px) * 2 );"> (25px + 25px) * 2 </div>
>-<div class="width-test" style="width: -webkit-calc(2 * 50px);">2 * 50px</div>
>-<div class="width-test" style="width: -webkit-calc(2 * 100px / 2);">2 * 100px / 2</div>
>-<div class="width-test" style="width: -webkit-calc((1em - 1em) + 100px);">(1em - 1em) + 100px</div>
>-<div class="width-test" style="width: -webkit-calc(50px +  +50px);">50px +  +50px</div>
>-<div class="width-test" style="width: -webkit-calc(-50px + 150px);">-50px + 150px</div>
>-<div class="width-test" style="width: -webkit-calc(-50px - -150px);">-50px - -150px</div>
>-<div class="width-test" style="width: -webkit-calc((((((((100px))))))));">(((((((100px)))))))</div>
>-<div class="height-test" style="height: -webkit-calc(100px);">100px</div>
>-<div style="height: 50px; background-color: white;" class="wrapper">
>-  <div class="height-test" style="height: -webkit-calc(100% * 2);">100% * 2</div>
>-</div>
>-</div>
>-
>-<script>
>-if (window.testRunner)
>-    testRunner.dumpAsText();
>-
>-zoomLevels = [1, 1.2, 2];
>-var test = document.getElementById("test");
>-for (var child = test.firstChild; child; child = child.nextSibling) {
>-    var element = child;
>-    if (element.className == "wrapper") {
>-        element = element.firstChild;
>-        while (element.tagName != "DIV") element = element.nextSibling;
>-    }
>-
>-    var error = [];
>-    for (var z = 0; z < zoomLevels.length; z++) {
>-        var zoom = zoomLevels[z];
>-        document.body.style.zoom = zoom;
>-        var width = element.offsetWidth;
>-        if (width != 100)
>-            error.push("@zoom=" + zoom + " expected width of 100, but was " + width);
>-        var height = element.offsetHeight;
>-        if (height != 100)
>-            error.push("@zoom=" + zoom + " expected height of 100, but was " + height);
>-    }
>-    if (error == "") {
>-        element.style.backgroundColor = "green";
>-        element.innerHTML += " => PASS";
>-    } else
>-        element.innerHTML += " => FAIL: " + error.join("; ");
>-}
>-document.body.style.zoom = 1;
>-</script>
>+<!DOCTYPE HTML>
>+<style>
>+.width-test {
>+    height: 100px;
>+    width: 256px;
>+    background-color: red;
>+}
>+
>+.height-test {
>+    width: 100px;
>+    height: 50px;
>+    background-color: red;
>+}
>+</style>
>+
>+<p>
>+    This file tests legacy support for the -webkit prefixed version of calc (ie -webkit-calc()).
>+</p>
>+<p>
>+  All boxes below should be 100px * 100px and green.
>+</p>
>+
>+<div id="test">
>+<div style="width:100px; height:100px;">control</div>
>+<div class="width-test" style="width: -webkit-calc(50px + 50px);">50px + 50px</div>
>+<div class="width-test" style="width: -webkit-calc(150px - 50px);">150px - 50px</div>
>+<div class="width-test" style="width: -webkit-calc(50px  +  50px);">50px  +  50px (2 spaces around operator)</div>
>+<div class="width-test" style="width: -webkit-calc(150px  -  50px);">150px  - 50px (2 spaces around operator)</div>
>+<div class="width-test" style="width: -webkit-calc(50px*2);">50px*2</div>
>+<div class="width-test" style="width: -webkit-calc(50px *2);">50px *2</div>
>+<div class="width-test" style="width: -webkit-calc(50px* 2);">50px* 2</div>
>+<div class="width-test" style="width: -webkit-calc(200px/2);">200px/2</div>
>+<div class="width-test" style="width: -webkit-calc(200px /2);">200px /2</div>
>+<div class="width-test" style="width: -webkit-calc(200px/ 2);">200px/ 2</div>
>+<div class="width-test" style="width: -webkit-calc(50px*(2));">50px*(2)</div>
>+<div class="width-test" style="width: -webkit-calc(50px *(2));">50px *(2)</div>
>+<div class="width-test" style="width: -webkit-calc(50px* (2));">50px* (2)</div>
>+<div class="width-test" style="width: -webkit-calc(50px*(1 + 1));">50px*(1 + 1)</div>
>+<div class="width-test" style="width: -webkit-calc(50px*(12 - 10));">50px*(12 - 10)</div>
>+<div class="width-test" style="width: -webkit-calc(50px*(10 / 5));">50px*(10 / 5)</div>
>+<div class="width-test" style="width: -webkit-calc(10px* (5 * 2));">10px* (5 * 2)</div>
>+<div class="width-test" style="width: -webkit-calc(50px + 10px * 5);">50px + 10px * 5 (operation order)</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: -webkit-calc(100%/2);">100%/2 (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: -webkit-calc(100% + -100px);">100% + -100px (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: -webkit-calc(80% - 60px);">80% - 60px (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: -webkit-calc(300px - 100%);">300px - 100% (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: -webkit-calc(-100px + 100%);">-100px + 100% (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: -webkit-calc(20% + 30%);">20% + 30% (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: -webkit-calc(80% - 30%);">80% - 30% (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: -webkit-calc(10% * 5);">10% * 5 (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: -webkit-calc(5 * 10%);">5 * 10% (where 100% is 200px)</div>
>+</div>
>+<div class="width-test" style="width: -webkit-calc((100px));">(100px)</div>
>+<div class="width-test" style="width: -webkit-calc((50px + 50px));">(50px + 50px)</div>
>+<div class="width-test" style="width: -webkit-calc((50px) + 50px);">(50px) + 50px</div>
>+<div class="width-test" style="width: -webkit-calc(50px + (50px));">50px + (50px)</div>
>+<div class="width-test" style="width: -webkit-calc( 50px +  50px );"> 50px +  50px </div>
>+<div class="width-test" style="width: -webkit-calc( 50px + 25px * 2 );"> 50px + 25px * 2 </div>
>+<div class="width-test" style="width: -webkit-calc( (25px + 25px) * 2 );"> (25px + 25px) * 2 </div>
>+<div class="width-test" style="width: -webkit-calc(2 * 50px);">2 * 50px</div>
>+<div class="width-test" style="width: -webkit-calc(2 * 100px / 2);">2 * 100px / 2</div>
>+<div class="width-test" style="width: -webkit-calc((1em - 1em) + 100px);">(1em - 1em) + 100px</div>
>+<div class="width-test" style="width: -webkit-calc(50px +  +50px);">50px +  +50px</div>
>+<div class="width-test" style="width: -webkit-calc(-50px + 150px);">-50px + 150px</div>
>+<div class="width-test" style="width: -webkit-calc(-50px - -150px);">-50px - -150px</div>
>+<div class="width-test" style="width: -webkit-calc((((((((100px))))))));">(((((((100px)))))))</div>
>+<div class="height-test" style="height: -webkit-calc(100px);">100px</div>
>+<div style="height: 50px; background-color: white;" class="wrapper">
>+  <div class="height-test" style="height: -webkit-calc(100% * 2);">100% * 2</div>
>+</div>
>+</div>
>+
>+<script>
>+if (window.testRunner)
>+    testRunner.dumpAsText();
>+
>+zoomLevels = [1, 1.2, 2];
>+var test = document.getElementById("test");
>+for (var child = test.firstChild; child; child = child.nextSibling) {
>+    var element = child;
>+    if (element.className == "wrapper") {
>+        element = element.firstChild;
>+        while (element.tagName != "DIV") element = element.nextSibling;
>+    }
>+
>+    var error = [];
>+    for (var z = 0; z < zoomLevels.length; z++) {
>+        var zoom = zoomLevels[z];
>+        document.body.style.zoom = zoom;
>+        var width = Math.round(element.offsetWidth);
>+        if (width != 100)
>+            error.push("@zoom=" + zoom + " expected width of 100, but was " + width);
>+        var height = Math.round(element.offsetHeight);
>+        if (height != 100)
>+            error.push("@zoom=" + zoom + " expected height of 100, but was " + height);
>+    }
>+    if (error == "") {
>+        element.style.backgroundColor = "green";
>+        element.innerHTML += " => PASS";
>+    } else
>+        element.innerHTML += " => FAIL: " + error.join("; ");
>+}
>+document.body.style.zoom = 1;
>+</script>
>diff --git a/LayoutTests/css3/calc/simple-calcs.html b/LayoutTests/css3/calc/simple-calcs.html
>index 6e842f368fee5c8eb7e653ad966f5359bc487d43..bc34f734acb3bac99f164e88814d6617f79f8184 100644
>--- a/LayoutTests/css3/calc/simple-calcs.html
>+++ b/LayoutTests/css3/calc/simple-calcs.html
>@@ -1,118 +1,118 @@
>-<!DOCTYPE HTML>
>-<style>
>-.width-test {
>-    height: 100px;
>-    width: 256px;
>-    background-color: red;
>-}
>-
>-.height-test {
>-    width: 100px;
>-    height: 50px;
>-    background-color: red;
>-}
>-</style>
>-
>-<p>
>-  All boxes below should be 100px * 100px and green.
>-</p>
>-
>-<div id="test">
>-<div style="width:100px; height:100px;">control</div>
>-<div class="width-test" style="width: calc(50px + 50px);">50px + 50px</div>
>-<div class="width-test" style="width: calc(150px - 50px);">150px - 50px</div>
>-<div class="width-test" style="width: calc(50px  +  50px);">50px  +  50px (2 spaces around operator)</div>
>-<div class="width-test" style="width: calc(150px  -  50px);">150px  - 50px (2 spaces around operator)</div>
>-<div class="width-test" style="width: calc(50px*2);">50px*2</div>
>-<div class="width-test" style="width: calc(50px *2);">50px *2</div>
>-<div class="width-test" style="width: calc(50px* 2);">50px* 2</div>
>-<div class="width-test" style="width: calc(200px/2);">200px/2</div>
>-<div class="width-test" style="width: calc(200px /2);">200px /2</div>
>-<div class="width-test" style="width: calc(200px/ 2);">200px/ 2</div>
>-<div class="width-test" style="width: calc(50px*(2));">50px*(2)</div>
>-<div class="width-test" style="width: calc(50px *(2));">50px *(2)</div>
>-<div class="width-test" style="width: calc(50px* (2));">50px* (2)</div>
>-<div class="width-test" style="width: calc(50px*(1 + 1));">50px*(1 + 1)</div>
>-<div class="width-test" style="width: calc(50px*(12 - 10));">50px*(12 - 10)</div>
>-<div class="width-test" style="width: calc(50px*(10 / 5));">50px*(10 / 5)</div>
>-<div class="width-test" style="width: calc(10px* (5 * 2));">10px* (5 * 2)</div>
>-<div class="width-test" style="width: calc(50px + 10px * 5);">50px + 10px * 5 (operation order)</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: calc(100%/2);">100%/2 (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: calc(100% + -100px);">100% + -100px (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: calc(80% - 60px);">80% - 60px (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: calc(300px - 100%);">300px - 100% (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: calc(-100px + 100%);">-100px + 100% (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: calc(20% + 30%);">20% + 30% (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: calc(80% - 30%);">80% - 30% (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: calc(10% * 5);">10% * 5 (where 100% is 200px)</div>
>-</div>
>-<div style="width: 200px; background-color: white;" class="wrapper">
>-    <div class="width-test" style="width: calc(5 * 10%);">5 * 10% (where 100% is 200px)</div>
>-</div>
>-<div class="width-test" style="width: calc((100px));">(100px)</div>
>-<div class="width-test" style="width: calc((50px + 50px));">(50px + 50px)</div>
>-<div class="width-test" style="width: calc((50px) + 50px);">(50px) + 50px</div>
>-<div class="width-test" style="width: calc(50px + (50px));">50px + (50px)</div>
>-<div class="width-test" style="width: calc( 50px +  50px );"> 50px +  50px </div>
>-<div class="width-test" style="width: calc( 50px + 25px * 2 );"> 50px + 25px * 2 </div>
>-<div class="width-test" style="width: calc( (25px + 25px) * 2 );"> (25px + 25px) * 2 </div>
>-<div class="width-test" style="width: calc(2 * 50px);">2 * 50px</div>
>-<div class="width-test" style="width: calc(2 * 100px / 2);">2 * 100px / 2</div>
>-<div class="width-test" style="width: calc((1em - 1em) + 100px);">(1em - 1em) + 100px</div>
>-<div class="width-test" style="width: calc(50px +  +50px);">50px +  +50px</div>
>-<div class="width-test" style="width: calc(-50px + 150px);">-50px + 150px</div>
>-<div class="width-test" style="width: calc(-50px - -150px);">-50px - -150px</div>
>-<div class="width-test" style="width: calc((((((((100px))))))));">(((((((100px)))))))</div>
>-<div class="height-test" style="height: calc(100px);">100px</div>
>-<div style="height: 50px; background-color: white;" class="wrapper">
>-  <div class="height-test" style="height: calc(100% * 2);">100% * 2</div>
>-</div>
>-</div>
>-
>-<script>
>-if (window.testRunner)
>-    testRunner.dumpAsText();
>-
>-zoomLevels = [1, 1.2, 2];
>-var test = document.getElementById("test");
>-for (var child = test.firstChild; child; child = child.nextSibling) {
>-    var element = child;
>-    if (element.className == "wrapper") {
>-        element = element.firstChild;
>-        while (element.tagName != "DIV") element = element.nextSibling;
>-    }
>-
>-    var error = [];
>-    for (var z = 0; z < zoomLevels.length; z++) {
>-        var zoom = zoomLevels[z];
>-        document.body.style.zoom = zoom;
>-        var width = element.offsetWidth;
>-        if (width != 100)
>-            error.push("@zoom=" + zoom + " expected width of 100, but was " + width);
>-        var height = element.offsetHeight;
>-        if (height != 100)
>-            error.push("@zoom=" + zoom + " expected height of 100, but was " + height);
>-    }
>-    if (error == "") {
>-        element.style.backgroundColor = "green";
>-        element.innerHTML += " => PASS";
>-    } else
>-        element.innerHTML += " => FAIL: " + error.join("; ");
>-}
>-document.body.style.zoom = 1;
>-</script>
>+<!DOCTYPE HTML>
>+<style>
>+.width-test {
>+    height: 100px;
>+    width: 256px;
>+    background-color: red;
>+}
>+
>+.height-test {
>+    width: 100px;
>+    height: 50px;
>+    background-color: red;
>+}
>+</style>
>+
>+<p>
>+  All boxes below should be 100px * 100px and green.
>+</p>
>+
>+<div id="test">
>+<div style="width:100px; height:100px;">control</div>
>+<div class="width-test" style="width: calc(50px + 50px);">50px + 50px</div>
>+<div class="width-test" style="width: calc(150px - 50px);">150px - 50px</div>
>+<div class="width-test" style="width: calc(50px  +  50px);">50px  +  50px (2 spaces around operator)</div>
>+<div class="width-test" style="width: calc(150px  -  50px);">150px  - 50px (2 spaces around operator)</div>
>+<div class="width-test" style="width: calc(50px*2);">50px*2</div>
>+<div class="width-test" style="width: calc(50px *2);">50px *2</div>
>+<div class="width-test" style="width: calc(50px* 2);">50px* 2</div>
>+<div class="width-test" style="width: calc(200px/2);">200px/2</div>
>+<div class="width-test" style="width: calc(200px /2);">200px /2</div>
>+<div class="width-test" style="width: calc(200px/ 2);">200px/ 2</div>
>+<div class="width-test" style="width: calc(50px*(2));">50px*(2)</div>
>+<div class="width-test" style="width: calc(50px *(2));">50px *(2)</div>
>+<div class="width-test" style="width: calc(50px* (2));">50px* (2)</div>
>+<div class="width-test" style="width: calc(50px*(1 + 1));">50px*(1 + 1)</div>
>+<div class="width-test" style="width: calc(50px*(12 - 10));">50px*(12 - 10)</div>
>+<div class="width-test" style="width: calc(50px*(10 / 5));">50px*(10 / 5)</div>
>+<div class="width-test" style="width: calc(10px* (5 * 2));">10px* (5 * 2)</div>
>+<div class="width-test" style="width: calc(50px + 10px * 5);">50px + 10px * 5 (operation order)</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: calc(100%/2);">100%/2 (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: calc(100% + -100px);">100% + -100px (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: calc(80% - 60px);">80% - 60px (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: calc(300px - 100%);">300px - 100% (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: calc(-100px + 100%);">-100px + 100% (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: calc(20% + 30%);">20% + 30% (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: calc(80% - 30%);">80% - 30% (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: calc(10% * 5);">10% * 5 (where 100% is 200px)</div>
>+</div>
>+<div style="width: 200px; background-color: white;" class="wrapper">
>+    <div class="width-test" style="width: calc(5 * 10%);">5 * 10% (where 100% is 200px)</div>
>+</div>
>+<div class="width-test" style="width: calc((100px));">(100px)</div>
>+<div class="width-test" style="width: calc((50px + 50px));">(50px + 50px)</div>
>+<div class="width-test" style="width: calc((50px) + 50px);">(50px) + 50px</div>
>+<div class="width-test" style="width: calc(50px + (50px));">50px + (50px)</div>
>+<div class="width-test" style="width: calc( 50px +  50px );"> 50px +  50px </div>
>+<div class="width-test" style="width: calc( 50px + 25px * 2 );"> 50px + 25px * 2 </div>
>+<div class="width-test" style="width: calc( (25px + 25px) * 2 );"> (25px + 25px) * 2 </div>
>+<div class="width-test" style="width: calc(2 * 50px);">2 * 50px</div>
>+<div class="width-test" style="width: calc(2 * 100px / 2);">2 * 100px / 2</div>
>+<div class="width-test" style="width: calc((1em - 1em) + 100px);">(1em - 1em) + 100px</div>
>+<div class="width-test" style="width: calc(50px +  +50px);">50px +  +50px</div>
>+<div class="width-test" style="width: calc(-50px + 150px);">-50px + 150px</div>
>+<div class="width-test" style="width: calc(-50px - -150px);">-50px - -150px</div>
>+<div class="width-test" style="width: calc((((((((100px))))))));">(((((((100px)))))))</div>
>+<div class="height-test" style="height: calc(100px);">100px</div>
>+<div style="height: 50px; background-color: white;" class="wrapper">
>+  <div class="height-test" style="height: calc(100% * 2);">100% * 2</div>
>+</div>
>+</div>
>+
>+<script>
>+if (window.testRunner)
>+    testRunner.dumpAsText();
>+
>+zoomLevels = [1, 1.2, 2];
>+var test = document.getElementById("test");
>+for (var child = test.firstChild; child; child = child.nextSibling) {
>+    var element = child;
>+    if (element.className == "wrapper") {
>+        element = element.firstChild;
>+        while (element.tagName != "DIV") element = element.nextSibling;
>+    }
>+
>+    var error = [];
>+    for (var z = 0; z < zoomLevels.length; z++) {
>+        var zoom = zoomLevels[z];
>+        document.body.style.zoom = zoom;
>+        var width = Math.round(element.offsetWidth);
>+        if (width != 100)
>+            error.push("@zoom=" + zoom + " expected width of 100, but was " + width);
>+        var height = Math.round(element.offsetHeight);
>+        if (height != 100)
>+            error.push("@zoom=" + zoom + " expected height of 100, but was " + height);
>+    }
>+    if (error == "") {
>+        element.style.backgroundColor = "green";
>+        element.innerHTML += " => PASS";
>+    } else
>+        element.innerHTML += " => FAIL: " + error.join("; ");
>+}
>+document.body.style.zoom = 1;
>+</script>
>diff --git a/LayoutTests/cssom/subpixel-offsetleft-top-width-height-values-expected.txt b/LayoutTests/cssom/subpixel-offsetleft-top-width-height-values-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..80121ad039772a017b085cfda1d78808957baf13
>--- /dev/null
>+++ b/LayoutTests/cssom/subpixel-offsetleft-top-width-height-values-expected.txt
>@@ -0,0 +1,801 @@
>+offsetTop:0.00 offsetLeft:0.00 offsetWidth:0.09 offsetHeight:0.09
>+clientTop:0.05 clientLeft:0.05 clientWidth:0.00 clientHeight:0.00
>+offsetTop:0.19 offsetLeft:0.09 offsetWidth:0.19 offsetHeight:0.19
>+clientTop:0.05 clientLeft:0.05 clientWidth:0.09 clientHeight:0.09
>+offsetTop:0.39 offsetLeft:0.39 offsetWidth:0.28 offsetHeight:0.28
>+clientTop:0.05 clientLeft:0.05 clientWidth:0.19 clientHeight:0.19
>+offsetTop:0.59 offsetLeft:0.89 offsetWidth:0.39 offsetHeight:0.39
>+clientTop:0.05 clientLeft:0.05 clientWidth:0.30 clientHeight:0.30
>+offsetTop:0.80 offsetLeft:1.59 offsetWidth:0.48 offsetHeight:0.48
>+clientTop:0.05 clientLeft:0.05 clientWidth:0.39 clientHeight:0.39
>+offsetTop:1.00 offsetLeft:2.50 offsetWidth:0.59 offsetHeight:0.59
>+clientTop:0.05 clientLeft:0.05 clientWidth:0.50 clientHeight:0.50
>+offsetTop:1.19 offsetLeft:3.59 offsetWidth:0.69 offsetHeight:0.69
>+clientTop:0.05 clientLeft:0.05 clientWidth:0.59 clientHeight:0.59
>+offsetTop:1.39 offsetLeft:4.89 offsetWidth:0.78 offsetHeight:0.78
>+clientTop:0.05 clientLeft:0.05 clientWidth:0.69 clientHeight:0.69
>+offsetTop:1.59 offsetLeft:6.39 offsetWidth:0.89 offsetHeight:0.89
>+clientTop:0.05 clientLeft:0.05 clientWidth:0.80 clientHeight:0.80
>+offsetTop:1.80 offsetLeft:8.09 offsetWidth:0.98 offsetHeight:0.98
>+clientTop:0.05 clientLeft:0.05 clientWidth:0.89 clientHeight:0.89
>+offsetTop:2.00 offsetLeft:10.00 offsetWidth:1.09 offsetHeight:1.09
>+clientTop:0.05 clientLeft:0.05 clientWidth:1.00 clientHeight:1.00
>+offsetTop:2.19 offsetLeft:12.09 offsetWidth:1.19 offsetHeight:1.19
>+clientTop:0.05 clientLeft:0.05 clientWidth:1.09 clientHeight:1.09
>+offsetTop:2.39 offsetLeft:14.39 offsetWidth:1.28 offsetHeight:1.28
>+clientTop:0.05 clientLeft:0.05 clientWidth:1.19 clientHeight:1.19
>+offsetTop:2.59 offsetLeft:16.89 offsetWidth:1.39 offsetHeight:1.39
>+clientTop:0.05 clientLeft:0.05 clientWidth:1.30 clientHeight:1.30
>+offsetTop:2.80 offsetLeft:19.59 offsetWidth:1.48 offsetHeight:1.48
>+clientTop:0.05 clientLeft:0.05 clientWidth:1.39 clientHeight:1.39
>+offsetTop:3.00 offsetLeft:22.50 offsetWidth:1.59 offsetHeight:1.59
>+clientTop:0.05 clientLeft:0.05 clientWidth:1.50 clientHeight:1.50
>+offsetTop:3.19 offsetLeft:25.59 offsetWidth:1.69 offsetHeight:1.69
>+clientTop:0.05 clientLeft:0.05 clientWidth:1.59 clientHeight:1.59
>+offsetTop:3.39 offsetLeft:28.89 offsetWidth:1.78 offsetHeight:1.78
>+clientTop:0.05 clientLeft:0.05 clientWidth:1.69 clientHeight:1.69
>+offsetTop:3.59 offsetLeft:32.39 offsetWidth:1.89 offsetHeight:1.89
>+clientTop:0.05 clientLeft:0.05 clientWidth:1.80 clientHeight:1.80
>+offsetTop:3.80 offsetLeft:36.09 offsetWidth:1.98 offsetHeight:1.98
>+clientTop:0.05 clientLeft:0.05 clientWidth:1.89 clientHeight:1.89
>+offsetTop:2.00 offsetLeft:0.30 offsetWidth:2.13 offsetHeight:2.13
>+clientTop:0.06 clientLeft:0.06 clientWidth:2.00 clientHeight:2.00
>+offsetTop:2.39 offsetLeft:2.39 offsetWidth:2.22 offsetHeight:2.22
>+clientTop:0.06 clientLeft:0.06 clientWidth:2.09 clientHeight:2.09
>+offsetTop:2.80 offsetLeft:4.69 offsetWidth:2.31 offsetHeight:2.31
>+clientTop:0.06 clientLeft:0.06 clientWidth:2.19 clientHeight:2.19
>+offsetTop:3.19 offsetLeft:7.19 offsetWidth:2.42 offsetHeight:2.42
>+clientTop:0.06 clientLeft:0.06 clientWidth:2.30 clientHeight:2.30
>+offsetTop:3.59 offsetLeft:9.89 offsetWidth:2.52 offsetHeight:2.52
>+clientTop:0.06 clientLeft:0.06 clientWidth:2.39 clientHeight:2.39
>+offsetTop:4.00 offsetLeft:12.80 offsetWidth:2.63 offsetHeight:2.63
>+clientTop:0.06 clientLeft:0.06 clientWidth:2.50 clientHeight:2.50
>+offsetTop:4.39 offsetLeft:15.89 offsetWidth:2.72 offsetHeight:2.72
>+clientTop:0.06 clientLeft:0.06 clientWidth:2.59 clientHeight:2.59
>+offsetTop:4.80 offsetLeft:19.19 offsetWidth:2.81 offsetHeight:2.81
>+clientTop:0.06 clientLeft:0.06 clientWidth:2.69 clientHeight:2.69
>+offsetTop:5.19 offsetLeft:22.69 offsetWidth:2.92 offsetHeight:2.92
>+clientTop:0.06 clientLeft:0.06 clientWidth:2.80 clientHeight:2.80
>+offsetTop:5.59 offsetLeft:26.39 offsetWidth:3.02 offsetHeight:3.02
>+clientTop:0.06 clientLeft:0.06 clientWidth:2.89 clientHeight:2.89
>+offsetTop:6.00 offsetLeft:30.30 offsetWidth:3.13 offsetHeight:3.13
>+clientTop:0.06 clientLeft:0.06 clientWidth:3.00 clientHeight:3.00
>+offsetTop:6.39 offsetLeft:34.39 offsetWidth:3.22 offsetHeight:3.22
>+clientTop:0.06 clientLeft:0.06 clientWidth:3.09 clientHeight:3.09
>+offsetTop:6.80 offsetLeft:38.69 offsetWidth:3.31 offsetHeight:3.31
>+clientTop:0.06 clientLeft:0.06 clientWidth:3.19 clientHeight:3.19
>+offsetTop:7.19 offsetLeft:43.19 offsetWidth:3.42 offsetHeight:3.42
>+clientTop:0.06 clientLeft:0.06 clientWidth:3.30 clientHeight:3.30
>+offsetTop:7.59 offsetLeft:47.89 offsetWidth:3.52 offsetHeight:3.52
>+clientTop:0.06 clientLeft:0.06 clientWidth:3.39 clientHeight:3.39
>+offsetTop:8.00 offsetLeft:52.80 offsetWidth:3.63 offsetHeight:3.63
>+clientTop:0.06 clientLeft:0.06 clientWidth:3.50 clientHeight:3.50
>+offsetTop:8.39 offsetLeft:57.89 offsetWidth:3.72 offsetHeight:3.72
>+clientTop:0.06 clientLeft:0.06 clientWidth:3.59 clientHeight:3.59
>+offsetTop:8.80 offsetLeft:63.19 offsetWidth:3.81 offsetHeight:3.81
>+clientTop:0.06 clientLeft:0.06 clientWidth:3.69 clientHeight:3.69
>+offsetTop:9.19 offsetLeft:68.69 offsetWidth:3.92 offsetHeight:3.92
>+clientTop:0.06 clientLeft:0.06 clientWidth:3.80 clientHeight:3.80
>+offsetTop:9.59 offsetLeft:74.39 offsetWidth:4.02 offsetHeight:4.02
>+clientTop:0.06 clientLeft:0.06 clientWidth:3.89 clientHeight:3.89
>+offsetTop:8.00 offsetLeft:0.80 offsetWidth:4.19 offsetHeight:4.19
>+clientTop:0.09 clientLeft:0.09 clientWidth:4.00 clientHeight:4.00
>+offsetTop:8.59 offsetLeft:4.89 offsetWidth:4.28 offsetHeight:4.28
>+clientTop:0.09 clientLeft:0.09 clientWidth:4.09 clientHeight:4.09
>+offsetTop:9.19 offsetLeft:9.19 offsetWidth:4.38 offsetHeight:4.38
>+clientTop:0.09 clientLeft:0.09 clientWidth:4.19 clientHeight:4.19
>+offsetTop:9.80 offsetLeft:13.69 offsetWidth:4.48 offsetHeight:4.48
>+clientTop:0.09 clientLeft:0.09 clientWidth:4.30 clientHeight:4.30
>+offsetTop:10.39 offsetLeft:18.39 offsetWidth:4.58 offsetHeight:4.58
>+clientTop:0.09 clientLeft:0.09 clientWidth:4.39 clientHeight:4.39
>+offsetTop:11.00 offsetLeft:23.30 offsetWidth:4.69 offsetHeight:4.69
>+clientTop:0.09 clientLeft:0.09 clientWidth:4.50 clientHeight:4.50
>+offsetTop:11.59 offsetLeft:28.39 offsetWidth:4.78 offsetHeight:4.78
>+clientTop:0.09 clientLeft:0.09 clientWidth:4.59 clientHeight:4.59
>+offsetTop:12.19 offsetLeft:33.69 offsetWidth:4.88 offsetHeight:4.88
>+clientTop:0.09 clientLeft:0.09 clientWidth:4.69 clientHeight:4.69
>+offsetTop:12.80 offsetLeft:39.19 offsetWidth:4.98 offsetHeight:4.98
>+clientTop:0.09 clientLeft:0.09 clientWidth:4.80 clientHeight:4.80
>+offsetTop:13.39 offsetLeft:44.89 offsetWidth:5.08 offsetHeight:5.08
>+clientTop:0.09 clientLeft:0.09 clientWidth:4.89 clientHeight:4.89
>+offsetTop:14.00 offsetLeft:50.80 offsetWidth:5.19 offsetHeight:5.19
>+clientTop:0.09 clientLeft:0.09 clientWidth:5.00 clientHeight:5.00
>+offsetTop:14.59 offsetLeft:56.89 offsetWidth:5.28 offsetHeight:5.28
>+clientTop:0.09 clientLeft:0.09 clientWidth:5.09 clientHeight:5.09
>+offsetTop:15.19 offsetLeft:63.19 offsetWidth:5.38 offsetHeight:5.38
>+clientTop:0.09 clientLeft:0.09 clientWidth:5.19 clientHeight:5.19
>+offsetTop:15.80 offsetLeft:69.69 offsetWidth:5.48 offsetHeight:5.48
>+clientTop:0.09 clientLeft:0.09 clientWidth:5.30 clientHeight:5.30
>+offsetTop:16.39 offsetLeft:76.39 offsetWidth:5.58 offsetHeight:5.58
>+clientTop:0.09 clientLeft:0.09 clientWidth:5.39 clientHeight:5.39
>+offsetTop:17.00 offsetLeft:83.30 offsetWidth:5.69 offsetHeight:5.69
>+clientTop:0.09 clientLeft:0.09 clientWidth:5.50 clientHeight:5.50
>+offsetTop:17.59 offsetLeft:90.39 offsetWidth:5.78 offsetHeight:5.78
>+clientTop:0.09 clientLeft:0.09 clientWidth:5.59 clientHeight:5.59
>+offsetTop:18.19 offsetLeft:97.69 offsetWidth:5.88 offsetHeight:5.88
>+clientTop:0.09 clientLeft:0.09 clientWidth:5.69 clientHeight:5.69
>+offsetTop:18.80 offsetLeft:105.19 offsetWidth:5.98 offsetHeight:5.98
>+clientTop:0.09 clientLeft:0.09 clientWidth:5.80 clientHeight:5.80
>+offsetTop:19.39 offsetLeft:112.89 offsetWidth:6.08 offsetHeight:6.08
>+clientTop:0.09 clientLeft:0.09 clientWidth:5.89 clientHeight:5.89
>+offsetTop:18.00 offsetLeft:1.50 offsetWidth:6.25 offsetHeight:6.25
>+clientTop:0.13 clientLeft:0.13 clientWidth:6.00 clientHeight:6.00
>+offsetTop:18.80 offsetLeft:7.59 offsetWidth:6.34 offsetHeight:6.34
>+clientTop:0.13 clientLeft:0.13 clientWidth:6.09 clientHeight:6.09
>+offsetTop:19.59 offsetLeft:13.89 offsetWidth:6.44 offsetHeight:6.44
>+clientTop:0.13 clientLeft:0.13 clientWidth:6.19 clientHeight:6.19
>+offsetTop:20.39 offsetLeft:20.39 offsetWidth:6.55 offsetHeight:6.55
>+clientTop:0.13 clientLeft:0.13 clientWidth:6.30 clientHeight:6.30
>+offsetTop:21.19 offsetLeft:27.09 offsetWidth:6.64 offsetHeight:6.64
>+clientTop:0.13 clientLeft:0.13 clientWidth:6.39 clientHeight:6.39
>+offsetTop:22.00 offsetLeft:34.00 offsetWidth:6.75 offsetHeight:6.75
>+clientTop:0.13 clientLeft:0.13 clientWidth:6.50 clientHeight:6.50
>+offsetTop:22.80 offsetLeft:41.09 offsetWidth:6.84 offsetHeight:6.84
>+clientTop:0.13 clientLeft:0.13 clientWidth:6.59 clientHeight:6.59
>+offsetTop:23.59 offsetLeft:48.39 offsetWidth:6.94 offsetHeight:6.94
>+clientTop:0.13 clientLeft:0.13 clientWidth:6.69 clientHeight:6.69
>+offsetTop:24.39 offsetLeft:55.89 offsetWidth:7.05 offsetHeight:7.05
>+clientTop:0.13 clientLeft:0.13 clientWidth:6.80 clientHeight:6.80
>+offsetTop:25.19 offsetLeft:63.59 offsetWidth:7.14 offsetHeight:7.14
>+clientTop:0.13 clientLeft:0.13 clientWidth:6.89 clientHeight:6.89
>+offsetTop:26.00 offsetLeft:71.50 offsetWidth:7.25 offsetHeight:7.25
>+clientTop:0.13 clientLeft:0.13 clientWidth:7.00 clientHeight:7.00
>+offsetTop:26.80 offsetLeft:79.59 offsetWidth:7.34 offsetHeight:7.34
>+clientTop:0.13 clientLeft:0.13 clientWidth:7.09 clientHeight:7.09
>+offsetTop:27.59 offsetLeft:87.89 offsetWidth:7.44 offsetHeight:7.44
>+clientTop:0.13 clientLeft:0.13 clientWidth:7.19 clientHeight:7.19
>+offsetTop:28.39 offsetLeft:96.39 offsetWidth:7.55 offsetHeight:7.55
>+clientTop:0.13 clientLeft:0.13 clientWidth:7.30 clientHeight:7.30
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>+offsetTop:667.00 offsetLeft:218.50 offsetWidth:37.50 offsetHeight:37.50
>+clientTop:0.50 clientLeft:0.50 clientWidth:36.50 clientHeight:36.50
>+offsetTop:670.80 offsetLeft:255.59 offsetWidth:37.59 offsetHeight:37.59
>+clientTop:0.50 clientLeft:0.50 clientWidth:36.59 clientHeight:36.59
>+offsetTop:674.59 offsetLeft:292.89 offsetWidth:37.69 offsetHeight:37.69
>+clientTop:0.50 clientLeft:0.50 clientWidth:36.69 clientHeight:36.69
>+offsetTop:678.39 offsetLeft:330.39 offsetWidth:37.80 offsetHeight:37.80
>+clientTop:0.50 clientLeft:0.50 clientWidth:36.80 clientHeight:36.80
>+offsetTop:682.19 offsetLeft:368.09 offsetWidth:37.89 offsetHeight:37.89
>+clientTop:0.50 clientLeft:0.50 clientWidth:36.89 clientHeight:36.89
>+offsetTop:686.00 offsetLeft:406.00 offsetWidth:38.00 offsetHeight:38.00
>+clientTop:0.50 clientLeft:0.50 clientWidth:37.00 clientHeight:37.00
>+offsetTop:689.80 offsetLeft:444.09 offsetWidth:38.09 offsetHeight:38.09
>+clientTop:0.50 clientLeft:0.50 clientWidth:37.09 clientHeight:37.09
>+offsetTop:693.59 offsetLeft:482.39 offsetWidth:38.19 offsetHeight:38.19
>+clientTop:0.50 clientLeft:0.50 clientWidth:37.19 clientHeight:37.19
>+offsetTop:697.39 offsetLeft:520.89 offsetWidth:38.30 offsetHeight:38.30
>+clientTop:0.50 clientLeft:0.50 clientWidth:37.30 clientHeight:37.30
>+offsetTop:701.19 offsetLeft:559.59 offsetWidth:38.39 offsetHeight:38.39
>+clientTop:0.50 clientLeft:0.50 clientWidth:37.39 clientHeight:37.39
>+offsetTop:705.00 offsetLeft:598.50 offsetWidth:38.50 offsetHeight:38.50
>+clientTop:0.50 clientLeft:0.50 clientWidth:37.50 clientHeight:37.50
>+offsetTop:708.80 offsetLeft:637.59 offsetWidth:38.59 offsetHeight:38.59
>+clientTop:0.50 clientLeft:0.50 clientWidth:37.59 clientHeight:37.59
>+offsetTop:712.59 offsetLeft:676.89 offsetWidth:38.69 offsetHeight:38.69
>+clientTop:0.50 clientLeft:0.50 clientWidth:37.69 clientHeight:37.69
>+offsetTop:716.39 offsetLeft:716.39 offsetWidth:38.80 offsetHeight:38.80
>+clientTop:0.50 clientLeft:0.50 clientWidth:37.80 clientHeight:37.80
>+offsetTop:720.19 offsetLeft:756.09 offsetWidth:38.89 offsetHeight:38.89
>+clientTop:0.50 clientLeft:0.50 clientWidth:37.89 clientHeight:37.89
>+offsetTop:722.00 offsetLeft:39.89 offsetWidth:39.03 offsetHeight:39.03
>+clientTop:0.52 clientLeft:0.52 clientWidth:38.00 clientHeight:38.00
>+offsetTop:726.00 offsetLeft:78.00 offsetWidth:39.13 offsetHeight:39.13
>+clientTop:0.52 clientLeft:0.52 clientWidth:38.09 clientHeight:38.09
>+offsetTop:730.00 offsetLeft:116.30 offsetWidth:39.22 offsetHeight:39.22
>+clientTop:0.52 clientLeft:0.52 clientWidth:38.19 clientHeight:38.19
>+offsetTop:734.00 offsetLeft:154.80 offsetWidth:39.33 offsetHeight:39.33
>+clientTop:0.52 clientLeft:0.52 clientWidth:38.30 clientHeight:38.30
>+offsetTop:738.00 offsetLeft:193.50 offsetWidth:39.42 offsetHeight:39.42
>+clientTop:0.52 clientLeft:0.52 clientWidth:38.39 clientHeight:38.39
>+offsetTop:742.00 offsetLeft:232.39 offsetWidth:39.53 offsetHeight:39.53
>+clientTop:0.52 clientLeft:0.52 clientWidth:38.50 clientHeight:38.50
>+offsetTop:746.00 offsetLeft:271.50 offsetWidth:39.63 offsetHeight:39.63
>+clientTop:0.52 clientLeft:0.52 clientWidth:38.59 clientHeight:38.59
>+offsetTop:750.00 offsetLeft:310.80 offsetWidth:39.72 offsetHeight:39.72
>+clientTop:0.52 clientLeft:0.52 clientWidth:38.69 clientHeight:38.69
>+offsetTop:754.00 offsetLeft:350.30 offsetWidth:39.83 offsetHeight:39.83
>+clientTop:0.52 clientLeft:0.52 clientWidth:38.80 clientHeight:38.80
>+offsetTop:758.00 offsetLeft:390.00 offsetWidth:39.92 offsetHeight:39.92
>+clientTop:0.52 clientLeft:0.52 clientWidth:38.89 clientHeight:38.89
>+offsetTop:762.00 offsetLeft:429.89 offsetWidth:40.03 offsetHeight:40.03
>+clientTop:0.52 clientLeft:0.52 clientWidth:39.00 clientHeight:39.00
>+offsetTop:766.00 offsetLeft:470.00 offsetWidth:40.13 offsetHeight:40.13
>+clientTop:0.52 clientLeft:0.52 clientWidth:39.09 clientHeight:39.09
>+offsetTop:770.00 offsetLeft:510.30 offsetWidth:40.22 offsetHeight:40.22
>+clientTop:0.52 clientLeft:0.52 clientWidth:39.19 clientHeight:39.19
>+offsetTop:774.00 offsetLeft:550.80 offsetWidth:40.33 offsetHeight:40.33
>+clientTop:0.52 clientLeft:0.52 clientWidth:39.30 clientHeight:39.30
>+offsetTop:778.00 offsetLeft:591.50 offsetWidth:40.42 offsetHeight:40.42
>+clientTop:0.52 clientLeft:0.52 clientWidth:39.39 clientHeight:39.39
>+offsetTop:782.00 offsetLeft:632.39 offsetWidth:40.53 offsetHeight:40.53
>+clientTop:0.52 clientLeft:0.52 clientWidth:39.50 clientHeight:39.50
>+offsetTop:786.00 offsetLeft:673.50 offsetWidth:40.63 offsetHeight:40.63
>+clientTop:0.52 clientLeft:0.52 clientWidth:39.59 clientHeight:39.59
>+offsetTop:790.00 offsetLeft:714.80 offsetWidth:40.72 offsetHeight:40.72
>+clientTop:0.52 clientLeft:0.52 clientWidth:39.69 clientHeight:39.69
>+offsetTop:794.00 offsetLeft:756.30 offsetWidth:40.83 offsetHeight:40.83
>+clientTop:0.52 clientLeft:0.52 clientWidth:39.80 clientHeight:39.80
>+offsetTop:798.00 offsetLeft:798.00 offsetWidth:40.92 offsetHeight:40.92
>+clientTop:0.52 clientLeft:0.52 clientWidth:39.89 clientHeight:39.89
>+
>diff --git a/LayoutTests/cssom/subpixel-offsetleft-top-width-height-values.html b/LayoutTests/cssom/subpixel-offsetleft-top-width-height-values.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..63f1410ba91db68cbd8ca3cfddda71940486b53d
>--- /dev/null
>+++ b/LayoutTests/cssom/subpixel-offsetleft-top-width-height-values.html
>@@ -0,0 +1,46 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<title>This tests that offset* and client* can return fractional values.</title>
>+<style>
>+div { 
>+  position: fixed;
>+  border-style: solid;
>+  border-color: red;
>+}
>+</style>
>+</head>
>+<body>
>+<script>
>+  if (window.testRunner)
>+    testRunner.dumpAsText();
>+    
>+  var container = document.body;
>+  w = 0;
>+  h = 0;
>+  adjustment = 0.1;
>+  for (i = 0; i < 20; ++i) {
>+    adjustment+=0.1;
>+    for (j = 0; j < 20; ++j) {
>+      var e = document.createElement("div");
>+      e.style.top = (w * i + j * adjustment) + "px";
>+      e.style.left = (w * j + i * adjustment) + "px";
>+      e.style.width = w + "px";
>+      e.style.height = h + "px";
>+      e.style.borderWidth = adjustment/4 + "px";
>+      container.appendChild(e);
>+      w+=0.1;
>+      h+=0.1;
>+    }
>+  }
>+  
>+  var result = "";
>+  var divs = document.getElementsByTagName("div");
>+  for (i = 0; i < divs.length; ++i) {
>+    var element = divs[i];
>+    result+="offsetTop:" + element.offsetTop.toFixed(2) + " offsetLeft:" + element.offsetLeft.toFixed(2) + " offsetWidth:" + element.offsetWidth.toFixed(2) + " offsetHeight:" + element.offsetHeight.toFixed(2) + "</br> clientTop:" + element.clientTop.toFixed(2) + " clientLeft:" + element.clientLeft.toFixed(2) + " clientWidth:" + element.clientWidth.toFixed(2) + " clientHeight:" + element.clientHeight.toFixed(2) + "</br>";
>+  }
>+  document.body.innerHTML = result;  
>+</script>
>+</body>
>+</html>
>\ No newline at end of file
>diff --git a/LayoutTests/editing/selection/drag-start-event-client-x-y.html b/LayoutTests/editing/selection/drag-start-event-client-x-y.html
>index 417798a1abd109f25e3b7d717dd7c4f6926c18af..b25545dc7dfcadbca6fdae48b5c03c228882c297 100644
>--- a/LayoutTests/editing/selection/drag-start-event-client-x-y.html
>+++ b/LayoutTests/editing/selection/drag-start-event-client-x-y.html
>@@ -43,10 +43,10 @@
> 
>             dragStartHandler: function(dragStart, dragDistance) {
>                 var resultElement = document.getElementById("result");
>-                shouldBe(resultElement, "clientX", dragStart.x, event.clientX);
>-                shouldBe(resultElement, "clientY", dragStart.y, event.clientY);
>-                shouldBe(resultElement, "pageX", dragStart.x, event.pageX);
>-                shouldBe(resultElement, "pageY", dragStart.y, event.pageY);
>+                shouldBe(resultElement, "clientX", Math.floor(dragStart.x), event.clientX);
>+                shouldBe(resultElement, "clientY", Math.floor(dragStart.y), event.clientY);
>+                shouldBe(resultElement, "pageX", Math.floor(dragStart.x), event.pageX);
>+                shouldBe(resultElement, "pageY", Math.floor(dragStart.y), event.pageY);
>             },
> 
>             runTest: function() {
>@@ -57,7 +57,7 @@
>                     testRunner.dumpAsText();
>                 
>                 var element = document.getElementById("draggable");
>-                var dragStart = { x: element.offsetLeft + element.offsetWidth / 2, y:  element.offsetTop + 1.0 };
>+                var dragStart = { x: Math.round(element.offsetLeft) + Math.round(element.offsetWidth) / 2, y:  Math.round(element.offsetTop) + 1.0 };
>                 var dragDistance = 10.0;
>                 element.ondragstart = this.dragStartHandler.bind(this, dragStart, dragDistance);
>                 
>@@ -71,9 +71,12 @@
>         </script>
>     </head>
>     <body onload="Test.runTest()">
>-        <h3>Test for <a href='https://bugs.webkit.org/show_bug.cgi?id=26723'>WebKit bug 26723</a>: clientX,Y , screenX , Y always (0, 0) in dragstart event</h3>
>-        <div id="draggable" class="test">
>-            DRAG ME!
>+        <h3>Test for <a href='https://bugs.webkit.org/show_bug.cgi?id=26723'>WebKit bug 26723</a>: clientX,Y , screenX , Y always (0, 0) in dragstart event</h3>
>+
>+        <div id="draggable" class="test">
>+
>+            DRAG ME!
>+
>         </div>
>         <div id="result"></div>
>     </body>
>diff --git a/LayoutTests/editing/selection/mixed-editability-10.html b/LayoutTests/editing/selection/mixed-editability-10.html
>index cfd31247d3e155b25ec167c4f1ca5079c70be5e5..d60113f5ce22ef8f2fd20f31a2f32c4217dd3eac 100644
>--- a/LayoutTests/editing/selection/mixed-editability-10.html
>+++ b/LayoutTests/editing/selection/mixed-editability-10.html
>@@ -55,8 +55,8 @@ function runTest(x, y, elem, offset, refpos) {
>     var anchorOffset = selection.anchorOffset;
> 
>     var coord = caretCoordinates();
>-    var anchorString = "Anchor (" + anchorNode + ", " + anchorOffset + " caret[" + coord.x + "," + coord.y + "] refpos=" + refpos + ")";
>-    var anchorCorrect = anchorNode == elem && anchorOffset == offset && coord.x == refpos;
>+    var anchorString = "Anchor (" + anchorNode + ", " + anchorOffset + " caret[" + coord.x + "," + coord.y + "] refpos=" + Math.round(refpos) + ")";
>+    var anchorCorrect = anchorNode == elem && anchorOffset == offset && coord.x == Math.round(refpos);
>     if (anchorCorrect)
>         log(anchorString + " is correct.");
>     else
>diff --git a/LayoutTests/fast/css/zoom-in-length-round-trip.html b/LayoutTests/fast/css/zoom-in-length-round-trip.html
>index f87ff2cf7c3c57d9bf6517af2572ad8ec177a16f..d9bd8aaaf603a105508318e55b03f1eb5c596746 100644
>--- a/LayoutTests/fast/css/zoom-in-length-round-trip.html
>+++ b/LayoutTests/fast/css/zoom-in-length-round-trip.html
>@@ -29,8 +29,8 @@
>     
>     for (zoom = 100; zoom <= 200; zoom += 1) {
>         containerStyle.setProperty("zoom", zoom / 100);
>-        if (target.offsetWidth != 1 || target.offsetHeight != 10) {
>-            if (hasSubpixelSupport && (target.offsetWidth == 1 || target.offsetWidth == 2) && (target.offsetHeight == 10 || target.offsetHeight == 11))
>+        if (Math.round(target.offsetWidth) != 1 || Math.round(target.offsetHeight) != 10) {
>+            if (hasSubpixelSupport && (Math.round(target.offsetWidth) == 1 || Math.round(target.offsetWidth) == 2) && (Math.round(target.offsetHeight) == 10 || Math.round(target.offsetHeight) == 11))
>                 continue; // With subpixel layout and pixel snapping we extend the box with one pixel at certain zoom levels.
>             failed = true;
>             log("FAIL at " + zoom + "% magnification: 1 mapped to " + target.offsetWidth + " and 10 mapped to " + target.offsetHeight + ".");
>diff --git a/LayoutTests/fast/dom/non-numeric-values-numeric-parameters-expected.txt b/LayoutTests/fast/dom/non-numeric-values-numeric-parameters-expected.txt
>index 36f38da8eee2c307259e73f62d67fa5f9d00ebea..7b5d1af640c5e16229c0c563542d46e2350a8c2a 100644
>--- a/LayoutTests/fast/dom/non-numeric-values-numeric-parameters-expected.txt
>+++ b/LayoutTests/fast/dom/non-numeric-values-numeric-parameters-expected.txt
>@@ -23,8 +23,8 @@ PASS nonNumericPolicy('document.elementFromPoint(x, 0)') is 'any type allowed'
> PASS nonNumericPolicy('document.elementFromPoint(0, x)') is 'any type allowed'
> PASS nonNumericPolicy('document.body.scrollByLines(x)') is 'any type allowed'
> PASS nonNumericPolicy('document.body.scrollByPages(x)') is 'any type allowed'
>-PASS nonNumericPolicy('document.body.scrollLeft = x') is 'any type allowed'
>-PASS nonNumericPolicy('document.body.scrollTop = x') is 'any type allowed'
>+PASS nonNumericPolicy('document.body.scrollLeft = x') is 'mixed'
>+PASS nonNumericPolicy('document.body.scrollTop = x') is 'mixed'
> PASS nonNumericPolicy('document.images.item(x)') is 'any type allowed'
> PASS nonNumericPolicy('document.createElement("input").setSelectionRange(x, 0)') is 'any type allowed'
> PASS nonNumericPolicy('document.createElement("input").setSelectionRange(0, x)') is 'any type allowed'
>diff --git a/LayoutTests/fast/dom/script-tests/non-numeric-values-numeric-parameters.js b/LayoutTests/fast/dom/script-tests/non-numeric-values-numeric-parameters.js
>index 8bccf5d8e305a9a25eeb03308d6bc0bf904d69aa..d35f341627be734faffcd16b36822efae4bde945 100644
>--- a/LayoutTests/fast/dom/script-tests/non-numeric-values-numeric-parameters.js
>+++ b/LayoutTests/fast/dom/script-tests/non-numeric-values-numeric-parameters.js
>@@ -226,8 +226,8 @@ shouldBe("nonNumericPolicy('document.elementFromPoint(0, x)')", "'any type allow
> 
> shouldBe("nonNumericPolicy('document.body.scrollByLines(x)')", "'any type allowed'");
> shouldBe("nonNumericPolicy('document.body.scrollByPages(x)')", "'any type allowed'");
>-shouldBe("nonNumericPolicy('document.body.scrollLeft = x')", "'any type allowed'");
>-shouldBe("nonNumericPolicy('document.body.scrollTop = x')", "'any type allowed'");
>+shouldBe("nonNumericPolicy('document.body.scrollLeft = x')", "'mixed'");
>+shouldBe("nonNumericPolicy('document.body.scrollTop = x')", "'mixed'");
> 
> // History
> 
>@@ -392,8 +392,8 @@ Here are other examples of numeric types in function parameters and settable att
> ../../../../WebCore/html/HTMLAppletElement.idl:                 attribute [ConvertFromString] long vspace;
> ../../../../WebCore/html/HTMLAreaElement.idl:        attribute long tabIndex;
> ../../../../WebCore/html/HTMLBaseFontElement.idl:        attribute long size;
>-../../../../WebCore/html/HTMLBodyElement.idl:                 attribute long scrollLeft;
>-../../../../WebCore/html/HTMLBodyElement.idl:                 attribute long scrollTop;
>+../../../../WebCore/html/HTMLBodyElement.idl:                 attribute float scrollLeft;
>+../../../../WebCore/html/HTMLBodyElement.idl:                 attribute float scrollTop;
> ../../../../WebCore/html/HTMLButtonElement.idl:                 attribute  long                 tabIndex;
> ../../../../WebCore/html/HTMLCanvasElement.idl:        attribute long width;
> ../../../../WebCore/html/HTMLCanvasElement.idl:        attribute long height;
>diff --git a/LayoutTests/fast/forms/basic-buttons.html b/LayoutTests/fast/forms/basic-buttons.html
>index 1ff98244967e634a1ead60083cfdfac75df2a1c5..6b78def32c1363609915e276afe20de159b6a2d3 100644
>--- a/LayoutTests/fast/forms/basic-buttons.html
>+++ b/LayoutTests/fast/forms/basic-buttons.html
>@@ -43,8 +43,8 @@ function printSize(tagname, cell)
>         var thisRow = thisCell.parentNode;
> 
>         button.parentNode.nextSibling.innerHTML = 
>-            "(" + button.offsetHeight + ", " + button.offsetWidth + ") " +
>-            "(" + button.clientHeight + ", " + button.clientWidth + ")";
>+            "(" + Math.round(button.offsetHeight) + ", " + Math.round(button.offsetWidth) + ") " +
>+            "(" + Math.round(button.clientHeight) + ", " + Math.round(button.clientWidth) + ")";
>     }
> }
> 
>diff --git a/LayoutTests/js/dom/dom-static-property-for-in-iteration-expected.txt b/LayoutTests/js/dom/dom-static-property-for-in-iteration-expected.txt
>index 36a4bb1ea1fb627fe19969975e169ec24fe78fc2..77465b1913a3e5635a7517179694c4fb60599d2d 100644
>--- a/LayoutTests/js/dom/dom-static-property-for-in-iteration-expected.txt
>+++ b/LayoutTests/js/dom/dom-static-property-for-in-iteration-expected.txt
>@@ -52,7 +52,6 @@ PASS a["offsetLeft"] is 8
> PASS a["offsetTop"] is 774
> PASS a["offsetWidth"] is 39
> PASS a["offsetHeight"] is 18
>-PASS a["offsetParent"] is [object HTMLBodyElement]
> PASS a["clientLeft"] is 0
> PASS a["clientTop"] is 0
> PASS a["clientWidth"] is 0
>@@ -61,6 +60,7 @@ PASS a["scrollLeft"] is 0
> PASS a["scrollTop"] is 0
> PASS a["scrollWidth"] is 0
> PASS a["scrollHeight"] is 0
>+PASS a["offsetParent"] is [object HTMLBodyElement]
> PASS a["className"] is 
> PASS a["classList"] is 
> PASS a["dataset"] is [object DOMStringMap]
>diff --git a/LayoutTests/platform/mac/fast/scrolling/scroll-div-latched-div.html b/LayoutTests/platform/mac/fast/scrolling/scroll-div-latched-div.html
>index 2969da8971f77e28c593246d4b0e454a7fe5fda9..f64711b429085b09f6c23add4fcb06cf4f65036f 100644
>--- a/LayoutTests/platform/mac/fast/scrolling/scroll-div-latched-div.html
>+++ b/LayoutTests/platform/mac/fast/scrolling/scroll-div-latched-div.html
>@@ -69,7 +69,7 @@ function scrollTest() {
>     // Scroll the #source until we reach the #target.
>     var startPosX = divTarget.offsetLeft + 20;
>     debug("div display height = " + divTarget.clientHeight);
>-    var startPosY = divTarget.offsetTop + divTarget.clientHeight - 42; // One wheel turn before end.
>+    var startPosY = Math.round(divTarget.offsetTop) + Math.round(divTarget.clientHeight) - 42; // One wheel turn before end.
>     eventSender.mouseMoveTo(startPosX, startPosY); // Make sure we are just outside the iFrame
>     debug("Mouse moved to (" + startPosX + ", " + startPosY + ")");
>     eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'began', 'none', true);
>diff --git a/LayoutTests/platform/mac/fast/scrolling/scroll-div-latched-mainframe.html b/LayoutTests/platform/mac/fast/scrolling/scroll-div-latched-mainframe.html
>index c43feaeebb93c5ced60b667046a74f20e994b904..c904d3bb02d29f34297fba50bae3e5e0b724c520 100644
>--- a/LayoutTests/platform/mac/fast/scrolling/scroll-div-latched-mainframe.html
>+++ b/LayoutTests/platform/mac/fast/scrolling/scroll-div-latched-mainframe.html
>@@ -66,8 +66,8 @@ function scrollTest() {
>     divScrollPositionBefore = divTarget.scrollTop;
> 
>     // Scroll the #source until we reach the #target.
>-    var startPosX = divTarget.offsetLeft + 20;
>-    var startPosY = divTarget.offsetTop - 42; // Slightly more than one wheel scroll away from the IFrame
>+    var startPosX = Math.round(divTarget.offsetLeft) + 20;
>+    var startPosY = Math.round(divTarget.offsetTop) - 42; // Slightly more than one wheel scroll away from the IFrame
>     eventSender.mouseMoveTo(startPosX, startPosY); // Make sure we are just outside the iFrame
>     debug("Mouse moved to (" + startPosX + ", " + startPosY + ")");
>     eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'began', 'none', true);
>diff --git a/LayoutTests/platform/mac/fast/scrolling/scroll-select-bottom-test.html b/LayoutTests/platform/mac/fast/scrolling/scroll-select-bottom-test.html
>index ab11c2541f7dfa638369977f6a3201ce7c30600d..956dcc0d4412fc0cdd3ca5008d26a9408e69c96a 100644
>--- a/LayoutTests/platform/mac/fast/scrolling/scroll-select-bottom-test.html
>+++ b/LayoutTests/platform/mac/fast/scrolling/scroll-select-bottom-test.html
>@@ -71,7 +71,7 @@ function scrollTest() {
>     // Scroll the #source until we reach the #target.
>     var startPosX = selectTarget.offsetLeft + 20;
>     debug("div display height = " + selectTarget.clientHeight);
>-    var startPosY = selectTarget.offsetTop + selectTarget.clientHeight + clientInset - 2; // Very near top (accounting for top content inset).
>+    var startPosY = Math.round(selectTarget.offsetTop) + Math.round(selectTarget.clientHeight) + clientInset - 2; // Very near top (accounting for top content inset).
>     eventSender.mouseMoveTo(startPosX, startPosY);
>     debug("Mouse moved to (" + startPosX + ", " + startPosY + ")");
>     eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'began', 'none', true);
>diff --git a/LayoutTests/platform/mac/fast/scrolling/scroll-select-latched-mainframe.html b/LayoutTests/platform/mac/fast/scrolling/scroll-select-latched-mainframe.html
>index 2d7a465d1687227af068971a1ea279c3f5557574..34ecb1e7402803229c62821945cac00c74f251e6 100644
>--- a/LayoutTests/platform/mac/fast/scrolling/scroll-select-latched-mainframe.html
>+++ b/LayoutTests/platform/mac/fast/scrolling/scroll-select-latched-mainframe.html
>@@ -66,8 +66,8 @@ function scrollTest() {
>     selectScrollPositionBefore = selectTarget.scrollTop;
> 
>     // Scroll the #source until we reach the #target.
>-    var startPosX = selectTarget.offsetLeft + 20;
>-    var startPosY = selectTarget.offsetTop - 42; // Slightly more than one wheel scroll away from the IFrame
>+    var startPosX = Math.round(selectTarget.offsetLeft) + 20;
>+    var startPosY = Math.round(selectTarget.offsetTop) - 42; // Slightly more than one wheel scroll away from the IFrame
>     eventSender.mouseMoveTo(startPosX, startPosY); // Make sure we are just outside the iFrame
>     debug("Mouse moved to (" + startPosX + ", " + startPosY + ")");
>     eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'began', 'none', true);
>diff --git a/LayoutTests/platform/mac/fast/scrolling/scroll-select-latched-select.html b/LayoutTests/platform/mac/fast/scrolling/scroll-select-latched-select.html
>index 97228466b97c3c6c7107e5849e79d2e239bf52f9..123e2a996195aa3e4e53acf13fdc8032899d419b 100644
>--- a/LayoutTests/platform/mac/fast/scrolling/scroll-select-latched-select.html
>+++ b/LayoutTests/platform/mac/fast/scrolling/scroll-select-latched-select.html
>@@ -67,9 +67,9 @@ function scrollTest() {
>     selectScrollPositionBefore = selectTarget.scrollTop;
> 
>     // Scroll the #source until we reach the #target.
>-    var startPosX = selectTarget.offsetLeft + 20;
>+    var startPosX = Math.round(selectTarget.offsetLeft) + 20;
>     debug("div display height = " + selectTarget.clientHeight);
>-    var startPosY = selectTarget.offsetTop + selectTarget.clientHeight - 42; // One wheel turn before end.
>+    var startPosY = Math.round(selectTarget.offsetTop) + Math.round(selectTarget.clientHeight) - 42; // One wheel turn before end.
>     eventSender.mouseMoveTo(startPosX, startPosY); // Make sure we are just outside the iFrame
>     debug("Mouse moved to (" + startPosX + ", " + startPosY + ")");
>     eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'began', 'none', true);
>diff --git a/LayoutTests/resources/check-layout.js b/LayoutTests/resources/check-layout.js
>index 05e6afd4888b9b14def4882c21ab4312574cf143..16873f8af26e364b9911e2915d740f4937831169 100644
>--- a/LayoutTests/resources/check-layout.js
>+++ b/LayoutTests/resources/check-layout.js
>@@ -37,63 +37,63 @@ function checkExpectedValues(node, failures)
>     var output = { checked: false };
>     var expectedWidth = checkAttribute(output, node, "data-expected-width");
>     if (expectedWidth) {
>-        if (node.offsetWidth != parseInt(expectedWidth))
>+        if (Math.round(node.offsetWidth) != parseInt(expectedWidth))
>             failures.push("Expected " + expectedWidth + " for width, but got " + node.offsetWidth + ". ");
>     }
> 
>     var expectedHeight = checkAttribute(output, node, "data-expected-height");
>     if (expectedHeight) {
>-        if (node.offsetHeight != parseInt(expectedHeight))
>+        if (Math.round(node.offsetHeight) != parseInt(expectedHeight))
>             failures.push("Expected " + expectedHeight + " for height, but got " + node.offsetHeight + ". ");
>     }
> 
>     var expectedOffset = checkAttribute(output, node, "data-offset-x");
>     if (expectedOffset) {
>-        if (node.offsetLeft != parseInt(expectedOffset))
>+        if (Math.round(node.offsetLeft) != parseInt(expectedOffset))
>             failures.push("Expected " + expectedOffset + " for offsetLeft, but got " + node.offsetLeft + ". ");
>     }
> 
>     var expectedOffset = checkAttribute(output, node, "data-offset-y");
>     if (expectedOffset) {
>-        if (node.offsetTop != parseInt(expectedOffset))
>+        if (Math.round(node.offsetTop) != parseInt(expectedOffset))
>             failures.push("Expected " + expectedOffset + " for offsetTop, but got " + node.offsetTop + ". ");
>     }
> 
>     var expectedWidth = checkAttribute(output, node, "data-expected-client-width");
>     if (expectedWidth) {
>-        if (node.clientWidth != parseInt(expectedWidth))
>+        if (Math.round(node.clientWidth) != parseInt(expectedWidth))
>             failures.push("Expected " + expectedWidth + " for clientWidth, but got " + node.clientWidth + ". ");
>     }
> 
>     var expectedHeight = checkAttribute(output, node, "data-expected-client-height");
>     if (expectedHeight) {
>-        if (node.clientHeight != parseInt(expectedHeight))
>+        if (Math.round(node.clientHeight) != parseInt(expectedHeight))
>             failures.push("Expected " + expectedHeight + " for clientHeight, but got " + node.clientHeight + ". ");
>     }
> 
>     var expectedWidth = checkAttribute(output, node, "data-expected-scroll-width");
>     if (expectedWidth) {
>-        if (node.scrollWidth != parseInt(expectedWidth))
>+        if (Math.round(node.scrollWidth) != parseInt(expectedWidth))
>             failures.push("Expected " + expectedWidth + " for scrollWidth, but got " + node.scrollWidth + ". ");
>     }
> 
>     var expectedHeight = checkAttribute(output, node, "data-expected-scroll-height");
>     if (expectedHeight) {
>-        if (node.scrollHeight != parseInt(expectedHeight))
>+        if (Math.round(node.scrollHeight) != parseInt(expectedHeight))
>             failures.push("Expected " + expectedHeight + " for scrollHeight, but got " + node.scrollHeight + ". ");
>     }
> 
>     var expectedOffset = checkAttribute(output, node, "data-total-x");
>     if (expectedOffset) {
>         var totalLeft = node.clientLeft + node.offsetLeft;
>-        if (totalLeft != parseInt(expectedOffset))
>+        if (Math.round(totalLeft) != parseInt(expectedOffset))
>             failures.push("Expected " + expectedOffset + " for clientLeft+offsetLeft, but got " + totalLeft + ", clientLeft: " + node.clientLeft + ", offsetLeft: " + node.offsetLeft + ". ");
>     }
> 
>     var expectedOffset = checkAttribute(output, node, "data-total-y");
>     if (expectedOffset) {
>         var totalTop = node.clientTop + node.offsetTop;
>-        if (totalTop != parseInt(expectedOffset))
>+        if (Math.round(totalTop) != parseInt(expectedOffset))
>             failures.push("Expected " + expectedOffset + " for clientTop+offsetTop, but got " + totalTop + ", clientTop: " + node.clientTop + ", + offsetTop: " + node.offsetTop + ". ");
>     }
>

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Attachments on bug 132895: 231432 | 231450 | 231454 | 231458 | 231465