[Oilpan] Migrate most classes under core/animations to Oilpan heap.

Source/core/animation/animatable/AnimatableClipPathOperation.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 28 matching lines @@
 
     if (m_operation->type() != ClipPathOperation::SHAPE || toOperation->m_operation->type() != ClipPathOperation::SHAPE)
         return true;
 
     const BasicShape* fromShape = toShapeClipPathOperation(clipPathOperation())->basicShape();
     const BasicShape* toShape = toShapeClipPathOperation(toOperation->clipPathOperation())->basicShape();
 
     return !fromShape->canBlend(toShape);
 }
 
-PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableClipPathOperation::interpolateTo(const AnimatableValue* value, double fraction) const
+AnimatableValue* AnimatableClipPathOperation::interpolateTo(const AnimatableValue* value, double fraction) const
 {
     if (usesDefaultInterpolationWith(value))
         return defaultInterpolateTo(this, value, fraction);
 
     const AnimatableClipPathOperation* toOperation = toAnimatableClipPathOperation(value);
     const BasicShape* fromShape = toShapeClipPathOperation(clipPathOperation())->basicShape();
     const BasicShape* toShape = toShapeClipPathOperation(toOperation->clipPathOperation())->basicShape();
 
     return AnimatableClipPathOperation::create(ShapeClipPathOperation::create(toShape->blend(fromShape, fraction)).get());
 }
 
 bool AnimatableClipPathOperation::equalTo(const AnimatableValue* value) const
 {
     const ClipPathOperation* operation = toAnimatableClipPathOperation(value)->m_operation.get();
     return m_operation == operation || (m_operation && operation && *m_operation == *operation);
 }
 
 }