Web Animations: Remove confusing interpolation subdirectory.

Source/core/animation/animatable/AnimatableValueKeyframe.cpp

 // 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.
 
 #include "config.h"
 #include "core/animation/animatable/AnimatableValueKeyframe.h"
 
-#include "core/animation/interpolation/LegacyStyleInterpolation.h"
+#include "core/animation/LegacyStyleInterpolation.h"
 
 namespace blink {
 
 AnimatableValueKeyframe::AnimatableValueKeyframe(const AnimatableValueKeyframe& copyFrom)
     : Keyframe(copyFrom.m_offset, copyFrom.m_composite, copyFrom.m_easing)
 {
     for (PropertyValueMap::const_iterator iter = copyFrom.m_propertyValues.begin(); iter != copyFrom.m_propertyValues.end(); ++iter)
         setPropertyValue(iter->key, iter->value.get());
 }
 
@@ skipping 52 matching lines @@
     return adoptPtrWillBeNoop(new AnimatableValueKeyframe::PropertySpecificKeyframe(offset, easing, AnimatableValue::neutralValue(), AnimationEffect::CompositeAdd));
 }
 
 void AnimatableValueKeyframe::PropertySpecificKeyframe::trace(Visitor* visitor)
 {
     visitor->trace(m_value);
     Keyframe::PropertySpecificKeyframe::trace(visitor);
 }
 
 }