Oilpan: fix build after r170943

Source/core/animation/StringKeyframe.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 StringKeyframe_h
 #define StringKeyframe_h
 
 #include "core/animation/Keyframe.h"
 #include "core/css/StylePropertySet.h"
 
@@ skipping 45 matching lines @@
     { }
 
     StringKeyframe(const StringKeyframe& copyFrom);
 
     void setPropertyCSSValue(CSSPropertyID, CSSValue*);
     virtual PassRefPtrWillBeRawPtr<Keyframe> clone() const OVERRIDE;
     virtual PassOwnPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> createPropertySpecificKeyframe(CSSPropertyID) const OVERRIDE;
 
     virtual bool isStringKeyframe() const OVERRIDE { return true; }
 
-    RefPtrWillBeRawPtr<MutableStylePropertySet> m_propertySet;
+    RefPtrWillBeMember<MutableStylePropertySet> m_propertySet;
 };
 
 typedef StringKeyframe::PropertySpecificKeyframe StringPropertySpecificKeyframe;
 
 DEFINE_TYPE_CASTS(StringKeyframe, Keyframe, value, value->isStringKeyframe(), value.isStringKeyframe());
 DEFINE_TYPE_CASTS(StringPropertySpecificKeyframe, Keyframe::PropertySpecificKeyframe, value, value->isStringPropertySpecificKeyframe(), value.isStringPropertySpecificKeyframe());
 
 }
 
 #endif