Revert "Drive SVG Animations via requestAnimationFrame"

Source/core/animation/AnimationClock.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 35 matching lines @@
 class AnimationClock {
 public:
     static PassOwnPtr<AnimationClock> create(WTF::TimeFunction monotonicallyIncreasingTime = WTF::monotonicallyIncreasingTime)
     {
         return adoptPtr(new AnimationClock(monotonicallyIncreasingTime));
     }
 
     void updateTime(double time);
     double currentTime();
     void unfreeze() { m_frozen = false; }
-    bool isFrozen() const { return m_frozen; }
     void resetTimeForTesting() { m_time = 0; m_frozen = true; }
 
 private:
     AnimationClock(WTF::TimeFunction monotonicallyIncreasingTime)
         : m_monotonicallyIncreasingTime(monotonicallyIncreasingTime)
         , m_time(0)
         , m_frozen(false)
     {
     }
     WTF::TimeFunction m_monotonicallyIncreasingTime;
     double m_time;
     bool m_frozen;
 };
 
 } // namespace WebCore
 
 #endif // AnimationClock_h