Move Animatable* hierarchy into new folder.

Source/core/animation/animatable/AnimatableLengthPoint.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 AnimatableLengthPoint_h
 #define AnimatableLengthPoint_h
 
-#include "core/animation/AnimatableValue.h"
+#include "core/animation/animatable/AnimatableValue.h"
 
 namespace WebCore {
 
 class AnimatableLengthPoint FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableLengthPoint() { }
     static PassRefPtrWillBeRawPtr<AnimatableLengthPoint> create(PassRefPtrWillBeRawPtr<AnimatableValue> x, PassRefPtrWillBeRawPtr<AnimatableValue> y)
     {
         return adoptRefWillBeNoop(new AnimatableLengthPoint(x, y));
     }
@@ skipping 20 matching lines @@
 
 inline const AnimatableLengthPoint* toAnimatableLengthPoint(const AnimatableValue* value)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(value && value->isLengthPoint());
     return static_cast<const AnimatableLengthPoint*>(value);
 }
 
 } // namespace WebCore
 
 #endif // AnimatableLengthPoint_h