[SVG] SVGAnimatedRect migration to new SVG property impl.

Source/core/svg/SVGZoomEvent.h

Index: Source/core/svg/SVGZoomEvent.h
diff --git a/Source/core/svg/SVGZoomEvent.h b/Source/core/svg/SVGZoomEvent.h
index 0ec57a942d07480f5a5c6c9226aad43fbddf838b..09d5b8d2a8b586d8fa36601de1046cb22a975742 100644
--- a/Source/core/svg/SVGZoomEvent.h
+++ b/Source/core/svg/SVGZoomEvent.h
@@ -33,7 +33,7 @@ public:
     static PassRefPtr<SVGZoomEvent> create() { return adoptRef(new SVGZoomEvent); }
 
     // 'SVGZoomEvent' functions
-    SVGRect zoomRectScreen() const;
+    PassRefPtr<SVGRectTearOff> zoomRectScreen() const;
 
     float previousScale() const;
     void setPreviousScale(float);
@@ -53,8 +53,6 @@ private:
     float m_newScale;
     float m_previousScale;
 
-    SVGRect m_zoomRectScreen;
-
     SVGPoint m_newTranslate;
     SVGPoint m_previousTranslate;
 };