Web Animations: Remove confusing interpolation subdirectory.

Source/core/animation/SampledEffect.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 SampledEffect_h
 #define SampledEffect_h
 
 #include "core/animation/Animation.h"
 #include "core/animation/AnimationPlayer.h"
-#include "core/animation/interpolation/Interpolation.h"
+#include "core/animation/Interpolation.h"
 #include "wtf/BitArray.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class SampledEffect : public NoBaseWillBeGarbageCollected<SampledEffect> {
 public:
     static PassOwnPtrWillBeRawPtr<SampledEffect> create(Animation* animation, PassOwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation> > > interpolations)
     {
         return adoptPtrWillBeNoop(new SampledEffect(animation, interpolations));
@@ skipping 21 matching lines @@
     RefPtr<AnimationPlayer> m_player;
 #endif
     OwnPtrWillBeMember<WillBeHeapVector<RefPtrWillBeMember<Interpolation> > > m_interpolations;
     AnimationPlayer::SortInfo m_playerSortInfo;
     Animation::Priority m_priority;
 };
 
 } // namespace blink
 
 #endif