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

Source/core/animation/ColorStyleInterpolation.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 ColorStyleInterpolation_h
 #define ColorStyleInterpolation_h
 
 #include "core/CoreExport.h"
 #include "core/animation/StyleInterpolation.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "platform/graphics/Color.h"
 
 namespace blink {
 
 class CORE_EXPORT ColorStyleInterpolation : public StyleInterpolation {
 public:
-    static PassRefPtrWillBeRawPtr<ColorStyleInterpolation> create(const CSSValue& start, const CSSValue& end, CSSPropertyID id)
+    static ColorStyleInterpolation* create(const CSSValue& start, const CSSValue& end, CSSPropertyID id)
     {
-        return adoptRefWillBeNoop(new ColorStyleInterpolation(colorToInterpolableValue(start), colorToInterpolableValue(end), id));
+        return new ColorStyleInterpolation(colorToInterpolableValue(start), colorToInterpolableValue(end), id);
     }
 
-    static PassRefPtrWillBeRawPtr<ColorStyleInterpolation> maybeCreateFromColor(const CSSValue& start, const CSSValue& end, CSSPropertyID);
+    static ColorStyleInterpolation* maybeCreateFromColor(const CSSValue& start, const CSSValue& end, CSSPropertyID);
 
     static bool shouldUseLegacyStyleInterpolation(const CSSValue& start, const CSSValue& end);
 
     static bool canCreateFrom(const CSSValue&);
 
     virtual void apply(StyleResolverState&) const override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    ColorStyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, CSSPropertyID id)
+    ColorStyleInterpolation(InterpolableValue* start, InterpolableValue* end, CSSPropertyID id)
         : StyleInterpolation(start, end, id)
     {
     }
 
-    static PassOwnPtrWillBeRawPtr<InterpolableValue> colorToInterpolableValue(const CSSValue&);
+    static InterpolableValue* colorToInterpolableValue(const CSSValue&);
     static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> interpolableValueToColor(const InterpolableValue&);
 
     friend class AnimationColorStyleInterpolationTest;
     friend class ShadowStyleInterpolation;
 };
 }
 
 #endif