Don't check all animation/transition properties when comparing RenderStyles

Source/core/platform/animation/CSSAnimationData.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 119 matching lines @@
     void setPlayState(EAnimPlayState d) { m_playState = d; m_playStateSet = true; }
     void setProperty(CSSPropertyID t) { m_property = t; m_propertySet = true; }
     void setTimingFunction(PassRefPtr<TimingFunction> f) { m_timingFunction = f; m_timingFunctionSet = true; }
     void setAnimationMode(AnimationMode mode) { m_mode = mode; }
 
     void setIsNoneAnimation(bool n) { m_isNone = n; }
 
     CSSAnimationData& operator=(const CSSAnimationData& o);
 
     // return true every CSSAnimationData in the chain (defined by m_next) match
-    bool operator==(const CSSAnimationData& o) const { return animationsMatch(&o); }
+    bool operator==(const CSSAnimationData& o) const { return animationsMatchForStyleRecalc(&o); }
     bool operator!=(const CSSAnimationData& o) const { return !(*this == o); }
 
     bool fillsBackwards() const { return m_fillModeSet && (m_fillMode == AnimationFillModeBackwards || m_fillMode == AnimationFillModeBoth); }
     bool fillsForwards() const { return m_fillModeSet && (m_fillMode == AnimationFillModeForwards || m_fillMode == AnimationFillModeBoth); }
 
 private:
     CSSAnimationData();
     explicit CSSAnimationData(const CSSAnimationData&);
 
-    // return true if all members of this class match (excluding m_next)
-    bool animationsMatch(const CSSAnimationData*) const;
+    // Return whether this object matches another CSSAnimationData object for
+    // the purposes of style recalc. This excludes some properties.
+    bool animationsMatchForStyleRecalc(const CSSAnimationData*) const;
 
     AtomicString m_name;
     CSSPropertyID m_property;
     AnimationMode m_mode;
     double m_iterationCount;
     double m_delay;
     double m_duration;
     RefPtr<TimingFunction> m_timingFunction;
     unsigned m_direction : 2; // AnimationDirection
     unsigned m_fillMode : 2;
@@ skipping 20 matching lines @@
     static double initialAnimationIterationCount() { return 1.0; }
     static const String& initialAnimationName();
     static EAnimPlayState initialAnimationPlayState() { return AnimPlayStatePlaying; }
     static CSSPropertyID initialAnimationProperty() { return CSSPropertyInvalid; }
     static const PassRefPtr<TimingFunction> initialAnimationTimingFunction() { return CubicBezierTimingFunction::preset(CubicBezierTimingFunction::Ease); }
 };
 
 } // namespace WebCore
 
 #endif // CSSAnimationData_h