Move Animatable* hierarchy into new folder.

Source/core/animation/animatable/AnimatableShadow.h

 /*
  * 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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef AnimatableShadow_h
 #define AnimatableShadow_h
 
-#include "core/animation/AnimatableValue.h"
+#include "core/animation/animatable/AnimatableValue.h"
 #include "core/rendering/style/ShadowList.h"
 
 namespace WebCore {
 
 class AnimatableShadow FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableShadow() { }
     static PassRefPtrWillBeRawPtr<AnimatableShadow> create(PassRefPtr<ShadowList> shadowList)
     {
         return adoptRefWillBeNoop(new AnimatableShadow(shadowList));
@@ skipping 14 matching lines @@
     virtual bool equalTo(const AnimatableValue*) const OVERRIDE;
 
     const RefPtr<ShadowList> m_shadowList;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableShadow, isShadow());
 
 } // namespace WebCore
 
 #endif // AnimatableShadow_h