Use HeapHashCountedSet for AnimationPlayerCountedSet

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 94 matching lines @@
 {
 #if !ENABLE(OILPAN)
     if (m_target)
         m_target->activeAnimations()->notifyAnimationDestroyed(this);
 #endif
 }
 
 void Animation::attach(AnimationPlayer* player)
 {
     if (m_target) {
-        m_target->ensureActiveAnimations().addPlayer(player);
+        m_target->ensureActiveAnimations().players().add(player);
         m_target->setNeedsAnimationStyleRecalc();
     }
     AnimationNode::attach(player);
 }
 
 void Animation::detach()
 {
     if (m_target)
-        m_target->activeAnimations()->removePlayer(player());
+        m_target->activeAnimations()->players().remove(player());
     if (m_sampledEffect)
         clearEffects();
     AnimationNode::detach();
 }
 
 void Animation::specifiedTimingChanged()
 {
     cancelAnimationOnCompositor();
     if (player()) {
         // FIXME: Needs to consider groups when added.
@@ skipping 172 matching lines @@
 
 void Animation::trace(Visitor* visitor)
 {
     visitor->trace(m_target);
     visitor->trace(m_effect);
     visitor->trace(m_sampledEffect);
     AnimationNode::trace(visitor);
 }
 
 } // namespace blink