Web Animations: Plumb compositor group id through animation creation and start/finish notifications

Source/core/rendering/compositing/CompositedLayerMapping.cpp

 /*
  * Copyright (C) 2009, 2010, 2011 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 2246 matching lines @@
     return client ? client->isTrackingPaintInvalidations() : false;
 }
 
 #if ENABLE(ASSERT)
 void CompositedLayerMapping::verifyNotPainting()
 {
     ASSERT(!renderer()->frame()->page() || !renderer()->frame()->page()->isPainting());
 }
 #endif
 
-void CompositedLayerMapping::notifyAnimationStarted(const GraphicsLayer*, double monotonicTime)
+void CompositedLayerMapping::notifyAnimationStarted(const GraphicsLayer*, double monotonicTime, int)
 {
     renderer()->node()->document().compositorPendingAnimations().notifyCompositorAnimationStarted(monotonicTime);
 }
 
 IntRect CompositedLayerMapping::pixelSnappedCompositedBounds() const
 {
     LayoutRect bounds = m_compositedBounds;
     bounds.move(m_owningLayer.subpixelAccumulation());
     return pixelSnappedIntRect(bounds);
 }
@@ skipping 91 matching lines @@
     } else if (graphicsLayer == m_scrollingBlockSelectionLayer.get()) {
         name = "Scrolling Block Selection Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink