[Webkit-unassigned] [Bug 187733] New: Layout Test media/modern-media-controls/tracks-panel/tracks-panel-position-and-size.html is flaky

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=187733

            Bug ID: 187733
           Summary: Layout Test
                    media/modern-media-controls/tracks-panel/tracks-panel-
                    position-and-size.html is flaky
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: David_fenton at apple.com
                CC: lforschler at apple.com

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

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