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

Source/core/animation/StyleInterpolation.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 StyleInterpolation_h
 #define StyleInterpolation_h
 
 #include "core/CSSPropertyNames.h"
 #include "core/CoreExport.h"
 #include "core/animation/Interpolation.h"
@@ skipping 35 matching lines @@
     }
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         Interpolation::trace(visitor);
     }
 
 protected:
     CSSPropertyID m_id;
 
-    StyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, CSSPropertyID id)
+    StyleInterpolation(InterpolableValue* start, InterpolableValue* end, CSSPropertyID id)
         : Interpolation(start, end)
         , m_id(id)
     {
     }
 };
 
 DEFINE_TYPE_CASTS(StyleInterpolation, Interpolation, value, value->isStyleInterpolation(), value.isStyleInterpolation());
 
 }
 
 #endif