Web Animations: Compositor start notification should only apply to animations in a matching group

Source/core/animation/Animation.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 235 matching lines @@
 }
 #endif
 
 bool Animation::isCandidateForAnimationOnCompositor(double playerPlaybackRate) const
 {
     if (!effect() || !m_target)
         return false;
     return CompositorAnimations::instance()->isCandidateForAnimationOnCompositor(specifiedTiming(), *effect(), playerPlaybackRate);
 }
 
-bool Animation::maybeStartAnimationOnCompositor(double startTime, double currentTime)
-{
-    return maybeStartAnimationOnCompositor(startTime, currentTime, 1);
-}
-
-bool Animation::maybeStartAnimationOnCompositor(double startTime, double currentTime, double playerPlaybackRate)
+bool Animation::maybeStartAnimationOnCompositor(int group, double startTime, double currentTime, double playerPlaybackRate)
 {
     ASSERT(!hasActiveAnimationsOnCompositor());
     if (!isCandidateForAnimationOnCompositor(playerPlaybackRate))
         return false;
     if (!CompositorAnimations::instance()->canStartAnimationOnCompositor(*m_target))
         return false;
-    if (!CompositorAnimations::instance()->startAnimationOnCompositor(*m_target, startTime, currentTime, specifiedTiming(), *effect(), m_compositorAnimationIds, playerPlaybackRate))
+    if (!CompositorAnimations::instance()->startAnimationOnCompositor(*m_target, group, startTime, currentTime, specifiedTiming(), *effect(), m_compositorAnimationIds, playerPlaybackRate))
         return false;
     ASSERT(!m_compositorAnimationIds.isEmpty());
     return true;
 }
 
 bool Animation::hasActiveAnimationsOnCompositor() const
 {
     return !m_compositorAnimationIds.isEmpty();
 }
 
@@ skipping 34 matching lines @@
 
 void Animation::trace(Visitor* visitor)
 {
     visitor->trace(m_target);
     visitor->trace(m_effect);
     visitor->trace(m_sampledEffect);
     AnimationNode::trace(visitor);
 }
 
 } // namespace blink