Composited Animations: Support --disable-threaded-animation in new animation system.

Source/web/LinkHighlightImpl.cpp

 /*
  * Copyright (C) 2012 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:
  *
  * 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
@@ skipping 64 matching lines @@
     , m_startTime(monotonicallyIncreasingTime())
 {
     ASSERT(m_node);
     ASSERT(owningWebViewImpl);
     WebCompositorSupport* compositorSupport = Platform::current()->compositorSupport();
     ASSERT(compositorSupport);
     m_contentLayer = adoptPtr(compositorSupport->createContentLayer(this));
     m_clipLayer = adoptPtr(compositorSupport->createLayer());
     m_clipLayer->setTransformOrigin(WebFloatPoint3D());
     m_clipLayer->addChild(m_contentLayer->layer());
-    if (RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled()) {
+    if (RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled() && Platform::current()->isThreadedAnimationEnabled()) {
         m_compositorPlayer = adoptPtr(compositorSupport->createAnimationPlayer());
         ASSERT(m_compositorPlayer);
         m_compositorPlayer->setAnimationDelegate(this);
         m_owningWebViewImpl->linkHighlightsTimeline()->playerAttached(*this);
         m_compositorPlayer->attachLayer(m_contentLayer->layer());
     } else {
         owningWebViewImpl->registerForAnimations(m_contentLayer->layer());
         m_contentLayer->layer()->setAnimationDelegate(this);
     }
     m_contentLayer->layer()->setDrawsContent(true);
@@ skipping 285 matching lines @@
 {
     return clipLayer();
 }
 
 WebCompositorAnimationPlayer* LinkHighlightImpl::compositorPlayer() const
 {
     return m_compositorPlayer.get();
 }
 
 } // namespace blink