Web animations: Supply CSS transition easing

Source/core/animation/KeyframeEffectModel.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 @@
     result = m_keyframes[0]->properties();
     for (size_t i = 1; i < m_keyframes.size(); i++) {
         PropertySet extras = m_keyframes[i]->properties();
         for (PropertySet::const_iterator it = extras.begin(); it != extras.end(); ++it) {
             result.add(*it);
         }
     }
     return result;
 }
 
-PassOwnPtr<Vector<RefPtr<Interpolation> > > KeyframeEffectModel::sample(int iteration, double fraction) const
+PassOwnPtr<Vector<RefPtr<Interpolation> > > KeyframeEffectModel::sample(int iteration, double fraction, double iterationDuration) const
 {
     ASSERT(iteration >= 0);
     ASSERT(!isNull(fraction));
     ensureKeyframeGroups();
     ensureInterpolationEffect();
 
-    return m_interpolationEffect->getActiveInterpolations(fraction);
+    return m_interpolationEffect->getActiveInterpolations(fraction, iterationDuration);
 }
 
 KeyframeEffectModel::KeyframeVector KeyframeEffectModel::normalizedKeyframes(const KeyframeVector& keyframes)
 {
     // keyframes [beginIndex, endIndex) will remain after removing all keyframes if they are not
     // loosely sorted by offset, and after removing keyframes with positional offset outide [0, 1].
     size_t beginIndex = 0;
     size_t endIndex = keyframes.size();
 
     // Becomes the most recent keyframe with an explicit offset.
@@ skipping 182 matching lines @@
     if (m_keyframes.last()->offset() != 1.0)
         appendKeyframe(adoptPtr(new PropertySpecificKeyframe(1, nullptr, AnimatableValue::neutralValue(), CompositeAdd)));
 }
 
 void KeyframeEffectModel::trace(Visitor* visitor)
 {
     visitor->trace(m_keyframes);
 }
 
 } // namespace