Notify paint for each frame

third_party/WebKit/Source/core/paint/FramePainter.h

Index: third_party/WebKit/Source/core/paint/FramePainter.h
diff --git a/third_party/WebKit/Source/core/paint/FramePainter.h b/third_party/WebKit/Source/core/paint/FramePainter.h
index 752f2699d9a7ad6df5a7a78ca39192f1a6304f31..6db6721475241973387834bc499b37d66404f73b 100644
--- a/third_party/WebKit/Source/core/paint/FramePainter.h
+++ b/third_party/WebKit/Source/core/paint/FramePainter.h
@@ -21,19 +21,22 @@ class FramePainter {
   WTF_MAKE_NONCOPYABLE(FramePainter);
 
  public:
-  explicit FramePainter(const FrameView& frame_view)
-      : frame_view_(&frame_view) {}
+  FramePainter(GraphicsContext&, const FrameView&);
+  ~FramePainter();
 
-  void Paint(GraphicsContext&, const GlobalPaintFlags, const CullRect&);
-  void PaintScrollbars(GraphicsContext&, const IntRect&);
-  void PaintContents(GraphicsContext&, const GlobalPaintFlags, const IntRect&);
-  void PaintScrollCorner(GraphicsContext&, const IntRect& corner_rect);
+  void Paint(const GlobalPaintFlags, const CullRect&);
+  void PaintScrollbars(const IntRect&);
+  void PaintContents(const GlobalPaintFlags, const IntRect&);
+  void PaintScrollCorner(const IntRect& corner_rect);
+
+  void NotifyPaint() const;
 
  private:
-  void PaintScrollbar(GraphicsContext&, Scrollbar&, const IntRect&);
+  void PaintScrollbar(Scrollbar&, const IntRect&);
 
-  const FrameView& GetFrameView();
+  const FrameView& GetFrameView() const;
 
+  GraphicsContext& context_;
   Member<const FrameView> frame_view_;
   static bool in_paint_contents_;
 };