Fix synchronization of SVGAnimatedAngle (<marker orient>)

third_party/WebKit/Source/core/svg/SVGAnimatedAngle.h

 /*
  * Copyright (C) 2014 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 19 matching lines @@
 
 #ifndef SVGAnimatedAngle_h
 #define SVGAnimatedAngle_h
 
 #include "core/svg/SVGAngleTearOff.h"
 #include "core/svg/SVGAnimatedEnumeration.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
-class SVGMarkerElement;
-
 class SVGAnimatedAngle final : public SVGAnimatedProperty<SVGAngle> {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<SVGAnimatedAngle> create(SVGMarkerElement* contextElement)
+    static PassRefPtrWillBeRawPtr<SVGAnimatedAngle> create(SVGElement* contextElement)
     {
         return adoptRefWillBeNoop(new SVGAnimatedAngle(contextElement));
     }
 
     ~SVGAnimatedAngle() override;
 
     SVGAnimatedEnumeration<SVGMarkerOrientType>* orientType() { return m_orientType.get(); }
 
     // SVGAnimatedPropertyBase:
-
+    bool needsSynchronizeAttribute() override;
     void synchronizeAttribute() override;
 
     void setAnimatedValue(PassRefPtrWillBeRawPtr<SVGPropertyBase>) override;
     void animationEnded() override;
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
-    explicit SVGAnimatedAngle(SVGMarkerElement* contextElement);
+    explicit SVGAnimatedAngle(SVGElement* contextElement);
 
 private:
     RefPtrWillBeMember<SVGAnimatedEnumeration<SVGMarkerOrientType>> m_orientType;
 };
 
 } // namespace blink
 
 #endif // SVGAnimatedAngle_h