Prepare for responsive CSS animations.

Source/core/animation/InterpolationEffect.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef InterpolationEffect_h
 #define InterpolationEffect_h
 
 #include "core/animation/Interpolation.h"
 #include "core/animation/Keyframe.h"
 #include "platform/RuntimeEnabledFeatures.h"
@@ skipping 12 matching lines @@
 
     void getActiveInterpolations(double fraction, double iterationDuration, OwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>>&) const;
 
     void addInterpolation(PassRefPtrWillBeRawPtr<Interpolation> interpolation, PassRefPtr<TimingFunction> easing, double start, double end, double applyFrom, double applyTo)
     {
         m_interpolations.append(InterpolationRecord::create(interpolation, easing, start, end, applyFrom, applyTo));
     }
 
     void addInterpolationsFromKeyframes(CSSPropertyID, Element*, Keyframe::PropertySpecificKeyframe& keyframeA, Keyframe::PropertySpecificKeyframe& keyframeB, double applyFrom, double applyTo);
 
+    template<typename T>
+    inline void forEachInterpolation(const T& callback)
+    {
+        for (auto& record : m_interpolations)
+            callback(*record->m_interpolation);
+    }
+
     void trace(Visitor*);
 
 private:
     InterpolationEffect()
     {
     }
 
     class InterpolationRecord : public NoBaseWillBeGarbageCollectedFinalized<InterpolationRecord> {
     public:
         RefPtrWillBeMember<Interpolation> m_interpolation;
@@ skipping 21 matching lines @@
         {
         }
     };
 
     WillBeHeapVector<OwnPtrWillBeMember<InterpolationRecord> > m_interpolations;
 };
 
 } // namespace blink
 
 #endif // InterpolationEffect_h