[Experimental] Supporting OOPIF printing

third_party/WebKit/Source/core/frame/RemoteFrameView.h

Index: third_party/WebKit/Source/core/frame/RemoteFrameView.h
diff --git a/third_party/WebKit/Source/core/frame/RemoteFrameView.h b/third_party/WebKit/Source/core/frame/RemoteFrameView.h
index c117abb58970d6949410abd4d7cfbf528499faf4..feb3949e4a7f8fbd0bab7a80138b094638810c58 100644
--- a/third_party/WebKit/Source/core/frame/RemoteFrameView.h
+++ b/third_party/WebKit/Source/core/frame/RemoteFrameView.h
@@ -13,7 +13,7 @@ namespace blink {
 
 class RemoteFrame;
 
-class RemoteFrameView final : public Widget {
+class RemoteFrameView final : public Widget, public DisplayItemClient {
  public:
   static RemoteFrameView* create(RemoteFrame*);
 
@@ -35,6 +35,13 @@ class RemoteFrameView final : public Widget {
   void hide() override;
   void show() override;
   void setParentVisible(bool) override;
+  void paint(GraphicsContext&, const CullRect&) const override;
+
+  // DisplayItemClient
+  LayoutRect visualRect() const override;
+  String debugName() const override;
+
+  int print(const IntRect&, int) const;
 
   DECLARE_VIRTUAL_TRACE();