Web Animations: Remove confusing interpolation subdirectory.

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 20 matching lines @@
 #include "config.h"
 #include "core/animation/Animation.h"
 
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/animation/ActiveAnimations.h"
 #include "core/animation/AnimationHelpers.h"
 #include "core/animation/AnimationPlayer.h"
 #include "core/animation/AnimationTimeline.h"
 #include "core/animation/CompositorAnimations.h"
+#include "core/animation/Interpolation.h"
 #include "core/animation/KeyframeEffectModel.h"
-#include "core/animation/interpolation/Interpolation.h"
 #include "core/dom/Element.h"
 #include "core/frame/UseCounter.h"
 #include "core/rendering/RenderLayer.h"
 
 namespace blink {
 
 PassRefPtrWillBeRawPtr<Animation> Animation::create(Element* target, PassRefPtrWillBeRawPtr<AnimationEffect> effect, const Timing& timing, Priority priority, PassOwnPtr<EventDelegate> eventDelegate)
 {
     return adoptRefWillBeNoop(new Animation(target, effect, timing, priority, eventDelegate));
 }
@@ skipping 254 matching lines @@
 
 void Animation::trace(Visitor* visitor)
 {
     visitor->trace(m_target);
     visitor->trace(m_effect);
     visitor->trace(m_sampledEffect);
     AnimationNode::trace(visitor);
 }
 
 } // namespace blink