Expose setting API to set ImageAnimationPolicy(Allowed, Once, None)

Source/core/rendering/RenderObject.h

Index: Source/core/rendering/RenderObject.h
diff --git a/Source/core/rendering/RenderObject.h b/Source/core/rendering/RenderObject.h
index 750ff8bf6e36690e9e606058b624319dffe5bcb4..8393d1106b9548d0404ece2a9f44840188c617c5 100644
--- a/Source/core/rendering/RenderObject.h
+++ b/Source/core/rendering/RenderObject.h
@@ -71,6 +71,12 @@ class TransformState;
 
 struct PaintInfo;
 
+enum AnimatedImageType {
+    AnimatedImageTypeNone,
+    AnimatedImageTypeOnce,
+    AnimatedImageTypeNormal
+};
+
 enum CursorDirective {
     SetCursorBasedOnStyle,
     SetCursor,
@@ -950,7 +956,7 @@ public:
 
     virtual void imageChanged(ImageResource*, const IntRect* = 0) override final;
     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) { }
-    virtual bool willRenderImage(ImageResource*) override final;
+    virtual bool willRenderImage(ImageResource*, bool repeated = false) override final;
 
     void selectionStartEnd(int& spos, int& epos) const;