When paintingSuppressed flag is true, paint_listener.waitForPaints() defers the
waiting paint to the next tick. The paintingSupressed flag is set when pres
shell is initialized and at that time if the document has not been loaded yet,
a timer is created to clear the flag after nglayout.initialpaint.delay
elapsed. And when the timer is fired, the flag is cleared, but if there is
still pending reflow, it's not cleared.
So what happened in the failure case;
1) In the first promise_test we wait for document load
2) The paintingSuppressed flag is set in the first promise_test and create the
timer
3) When the document has been loaded but the timer has not yet been fired,
start test refresh mode and create an element in the subsequent promise_test
4) Creating the element triggers a reflow
5) waitForPaints() is called
6) The timer is fired, but there is a pending reflow, so skip clearing the flag
7) Now it's in the test refresh mode, the pending flow will never be processed
until some triggers happen (i.e. mouse movement, calling
advanceTimeAndRefresh, etc.)
8) The test is timed out
MozReview-Commit-ID: 5fLn9SNHp1J
--HG--
extra : rebase_source : 3115a5d5ac1405f18efde7ade1fb9738858c518f
Before this patch we skipped KeyframeEffectReadOnly::ComposeStyle() for
animations that are not in effect.
After this patch we call KeyframeEffectReadOnly::ComposeStyle() even if the
animation is not in-effect state in order to prepare the base style for
properties that can be run on the compositor because the in-effect animation
will be sent to the compositor and might be composed onto the base style on the
compositor after the animation gets out of its delay phase.
MozReview-Commit-ID: FuAZv4jqVMJ
--HG--
extra : rebase_source : 9ef2f078e5ee18735fb8cd3086f20774fe8b1fd0
Test cases in file_composite.html are matching pair of tests in
web-platform-tests.
MozReview-Commit-ID: ApuvVCHKQ8Y
--HG--
extra : rebase_source : 58342389a3eb1ed2a3c1889b5ce974dbde19c32f
Hiroyuki Ikezoe
Boris Chiou
Hiroyuki Ikezoe
Mantaroh Yoshinaga