NEW 168823
Placing <video> in a region incorrectly positions the play button 
https://bugs.webkit.org/show_bug.cgi?id=168823
Summary Placing <video> in a region incorrectly positions the play button
Antoine Quint
Reported 2017-02-23 22:57:46 PST
An example of this is the test at fast/regions/inline-block-inside-anonymous-overflow-with-covered-controls.html. Look at this test compared to fast/regions/inline-block-inside-anonymous-overflow-with-covered-controls-expected.html in Safari (not in DRT since this test turns of modern media controls) and see the slight difference in positioning. This appears to be compositing-related since turning off the play button as a layer positions it correctly and getBoundingClientRect() doesn't return differences in layout between the two files.
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Radar WebKit Bug Importer
Comment 1 2017-02-23 22:58:16 PST
<rdar://problem/30691740>
Antoine Quint
Comment 2 2017-02-23 23:03:08 PST
This started happening after https://bugs.webkit.org/show_bug.cgi?id=168800 which made the problem evident.
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