Remove more oilpan.

sky/engine/core/animation/ActiveAnimations.h

 /*
  * 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 28 matching lines @@
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class CSSAnimations;
 class RenderObject;
 class Element;
 
 typedef HashCountedSet<RawPtr<AnimationPlayer> > AnimationPlayerCountedSet;
 
-class ActiveAnimations : public DummyBase<ActiveAnimations> {
+class ActiveAnimations {
     WTF_MAKE_NONCOPYABLE(ActiveAnimations);
 public:
     ActiveAnimations()
         : m_animationStyleChange(false)
     {
     }
 
     ~ActiveAnimations();
 
     // Animations that are currently active for this element, their effects will be applied
@@ skipping 37 matching lines @@
     Vector<Animation*> m_animations;
 #endif
 
     // CSSAnimations checks if a style change is due to animation.
     friend class CSSAnimations;
 };
 
 } // namespace blink
 
 #endif