Move Animatable* hierarchy into new folder.

Source/core/animation/animatable/AnimatableDouble.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 11 matching lines @@
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * 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.
  */
 
 #include "config.h"
-#include "core/animation/AnimatableDouble.h"
+#include "core/animation/animatable/AnimatableDouble.h"
 
 #include "platform/animation/AnimationUtilities.h"
 #include <math.h>
 
 namespace WebCore {
 
 bool AnimatableDouble::usesDefaultInterpolationWith(const AnimatableValue* value) const
 {
     const AnimatableDouble* other = toAnimatableDouble(value);
     return (m_constraint == InterpolationIsNonContinuousWithZero) && (!m_number || !other->m_number);
@@ skipping 13 matching lines @@
     return m_number == toAnimatableDouble(value)->m_number;
 }
 
 double AnimatableDouble::distanceTo(const AnimatableValue* value) const
 {
     const AnimatableDouble* other = toAnimatableDouble(value);
     return fabs(m_number - other->m_number);
 }
 
 } // namespace WebCore