Oilpan: Fix oilpan builds after r170720

Source/core/animation/StringKeyframe.h

Index: Source/core/animation/StringKeyframe.h
diff --git a/Source/core/animation/StringKeyframe.h b/Source/core/animation/StringKeyframe.h
index c2cd1283e24118068955860580081df47d4555c4..fb8a452b00ade9774190302cc8fc3a35a545bae3 100644
--- a/Source/core/animation/StringKeyframe.h
+++ b/Source/core/animation/StringKeyframe.h
@@ -12,7 +12,10 @@ namespace WebCore {
 
 class StringKeyframe : public Keyframe {
 public:
-    static PassRefPtr<StringKeyframe> create() { return adoptRef(new StringKeyframe); }
+    static PassRefPtrWillBeRawPtr<StringKeyframe> create()
+    {
+        return adoptRefWillBeNoop(new StringKeyframe);
+    }
     void setPropertyValue(CSSPropertyID property, const String& value)
     {
         m_propertyValues.add(property, value);
@@ -25,18 +28,23 @@ public:
     }
     virtual PropertySet properties() const OVERRIDE;
 
+    virtual void trace(Visitor*) OVERRIDE;
+
     class PropertySpecificKeyframe : public Keyframe::PropertySpecificKeyframe {
     public:
         PropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, const String& value, AnimationEffect::CompositeOperation);
 
         const String& value() const { return m_value; }
 
-        virtual PassOwnPtr<Keyframe::PropertySpecificKeyframe> neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const OVERRIDE FINAL;
-        virtual PassRefPtr<Interpolation> createInterpolation(CSSPropertyID, WebCore::Keyframe::PropertySpecificKeyframe* end) const OVERRIDE FINAL;
+        virtual PassOwnPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> neutralKeyframe(double offset, PassRefPtr<TimingFunction> easing) const OVERRIDE FINAL;
+        virtual PassRefPtrWillBeRawPtr<Interpolation> createInterpolation(CSSPropertyID, WebCore::Keyframe::PropertySpecificKeyframe* end) const OVERRIDE FINAL;
+
+        virtual void trace(Visitor*) OVERRIDE;
+
     private:
         PropertySpecificKeyframe(double offset, PassRefPtr<TimingFunction> easing, const String& value);
 
-        virtual PassOwnPtr<Keyframe::PropertySpecificKeyframe> cloneWithOffset(double offset) const;
+        virtual PassOwnPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> cloneWithOffset(double offset) const;
         virtual bool isStringPropertySpecificKeyframe() const OVERRIDE { return true; }
 
         String m_value;
@@ -48,7 +56,7 @@ private:
     StringKeyframe(const StringKeyframe& copyFrom);
 
     virtual PassRefPtrWillBeRawPtr<Keyframe> clone() const OVERRIDE;
-    virtual PassOwnPtr<Keyframe::PropertySpecificKeyframe> createPropertySpecificKeyframe(CSSPropertyID) const OVERRIDE;
+    virtual PassOwnPtrWillBeRawPtr<Keyframe::PropertySpecificKeyframe> createPropertySpecificKeyframe(CSSPropertyID) const OVERRIDE;
 
     virtual bool isStringKeyframe() const OVERRIDE { return true; }