Oilpan: Move CSSAnimations, CSSAnimationUpdate and ActiveAnimations to oilpan's heap

Source/core/animation/ActiveAnimations.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 82 matching lines @@
 {
     return m_defaultStack.hasActiveAnimationsOnCompositor(property);
 }
 
 void ActiveAnimations::cancelAnimationOnCompositor()
 {
     for (AnimationPlayerSet::iterator it = m_players.begin(); it != players().end(); ++it)
         it->key->cancelAnimationOnCompositor();
 }
 
+void ActiveAnimations::trace(Visitor* visitor)
+{
+    visitor->trace(m_cssAnimations);
+}
+
 } // namespace WebCore