Bug 187733

Summary:	Layout Test media/modern-media-controls/tracks-panel/tracks-panel-position-and-size.html is flaky
Product:	WebKit	Reporter:	Dawei Fenton (:realdawei) <realdawei>
Component:	Tools / Tests	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	graouts, lforschler, ryanhaddad, tsavell
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Dawei Fenton (:realdawei) 2018-07-17 10:58:45 PDT

The following layout test is flaky on [High Sierra Debug WK1 and Sierra Debug WK1]

media/modern-media-controls/tracks-panel/tracks-panel-position-and-size.html

Sample Diff:
--- /Volumes/Data/slave/highsierra-debug-tests-wk1/build/layout-test-results/media/modern-media-controls/tracks-panel/tracks-panel-position-and-size-expected.txt
+++ /Volumes/Data/slave/highsierra-debug-tests-wk1/build/layout-test-results/media/modern-media-controls/tracks-panel/tracks-panel-position-and-size-actual.txt
@@ -5,7 +5,7 @@
 
 PASS mediaControls.tracksButton.element.getBoundingClientRect().right became different from 0
 mediaControls.showTracksPanel()
-PASS mediaControls.tracksPanel.element.style.right is "22px"
+FAIL mediaControls.tracksPanel.element.style.right should be 22px. Was 20px.
 PASS mediaControls.tracksPanel.element.style.bottom is "38px"
 PASS getComputedStyle(mediaControls.tracksPanel.element).height is "252px"
 PASS getComputedStyle(mediaControls.tracksPanel.element.lastElementChild).height is "252px"


Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=media%2Fmodern-media-controls%2Ftracks-panel%2Ftracks-panel-position-and-size.html