Modify AnimationEffect::sample() to return a CompositableValue

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 42 matching lines @@
     if (m_isInTargetActiveAnimationsList)
         m_target->removeActiveAnimation(this);
 }
 
 void Animation::applyEffects(bool previouslyActiveOrInEffect)
 {
     if (!previouslyActiveOrInEffect) {
         m_target->addActiveAnimation(this);
         m_isInTargetActiveAnimationsList = true;
     }
-    m_cachedStyle = m_effect->sample(0, currentIteration());
+    m_compositableValues = m_effect->sample(currentIteration(), 0.0);
     m_target->setNeedsStyleRecalc(SyntheticStyleChange);
 }
 
 void Animation::clearEffects()
 {
     m_target->removeActiveAnimation(this);
     m_isInTargetActiveAnimationsList = false;
-    m_cachedStyle.clear();
+    m_compositableValues.clear();
 }
 
 void Animation::updateChildrenAndEffects(bool wasActiveOrInEffect) const
 {
     const bool isActiveOrInEffect = isActive() || isInEffect();
     ASSERT(m_isInTargetActiveAnimationsList == wasActiveOrInEffect);
     if (wasActiveOrInEffect && !isActiveOrInEffect)
         const_cast<Animation*>(this)->clearEffects();
     else if (isActiveOrInEffect)
         const_cast<Animation*>(this)->applyEffects(wasActiveOrInEffect);
 }
 
 } // namespace