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Bug 1409657 - Wait for one more frame after MozAfterPaint is received to avoid intermittent failures. r=birtles

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Because of bug 1341294, we sometimes receive other MozAfterPaint event that
what we are not waiting for.

MozReview-Commit-ID: 5ltrPv1igs7

--HG--
extra : rebase_source : faf8f760800be4e8dc4bf01fe66381c132910e87
This commit is contained in:
Hiroyuki Ikezoe 2017-10-23 07:04:03 +09:00
parent 135776b0c7
commit 2791600a48
1 changed files with 9 additions and 1 deletions
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10
layout/reftests/css-animations/animation-on-empty-height-frame.html
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@ -17,7 +17,15 @@ window.addEventListener('load', () => {
// (The animation will initially paint the background red since it is playing
// a step-end animation in reverse.)
window.addEventListener('MozAfterPaint', () => {
document.documentElement.classList.remove('reftest-wait');
// FIXME: Bug 1341294. We need to wait for one more frame in the case
// the MozAfterPaint we received is not the one what we were waiting for.
// Note that we can't just wait for one more MozAfterPaint since in the
// case where everything works correctly, we won't get another
// MozAfterPaint for a long time due to the step-end timing function
// applied to the animation.
requestAnimationFrame(() => {
document.documentElement.classList.remove('reftest-wait');
});
}, {once: true});
});
});