Smaller vtbls in RenderObject

Source/core/rendering/RenderMedia.h

Index: Source/core/rendering/RenderMedia.h
diff --git a/Source/core/rendering/RenderMedia.h b/Source/core/rendering/RenderMedia.h
index a5cda7b6274bcb36ce0e35af7fb720f5adc8cc97..04615ecb33d33f416bc39c51487d38c44f24a7ea 100644
--- a/Source/core/rendering/RenderMedia.h
+++ b/Source/core/rendering/RenderMedia.h
@@ -53,6 +53,8 @@ public:
 protected:
     virtual void layout() OVERRIDE;
 
+    virtual bool isOfType(RenderObjectType type) const OVERRIDE { return type == RenderObjectMedia || RenderImage::isOfType(type); }
+
 private:
     virtual RenderObjectChildList* virtualChildren() OVERRIDE FINAL { return children(); }
     virtual const RenderObjectChildList* virtualChildren() const OVERRIDE FINAL { return children(); }
@@ -65,7 +67,6 @@ private:
     virtual bool canHaveChildren() const OVERRIDE FINAL { return true; }
 
     virtual const char* renderName() const OVERRIDE { return "RenderMedia"; }
-    virtual bool isMedia() const OVERRIDE FINAL { return true; }
     virtual bool isImage() const OVERRIDE FINAL { return false; }
     virtual void paintReplaced(PaintInfo&, const LayoutPoint&) OVERRIDE;