[Experimental] Supporting OOPIF printing

content/renderer/render_frame_proxy.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_FRAME_PROXY_H_
 #define CONTENT_RENDERER_RENDER_FRAME_PROXY_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
@@ skipping 126 matching lines @@
                 bool should_replace_current_entry) override;
   void forwardInputEvent(const blink::WebInputEvent* event) override;
   void frameRectsChanged(const blink::WebRect& frame_rect) override;
   void updateRemoteViewportIntersection(
       const blink::WebRect& viewportIntersection) override;
   void visibilityChanged(bool visible) override;
   void didChangeOpener(blink::WebFrame* opener) override;
   void advanceFocus(blink::WebFocusType type,
                     blink::WebLocalFrame* source) override;
   void frameFocused() override;
+  int print(const blink::WebRect& rect, int page_num) override;
 
   // IPC handlers
   void OnDidStartLoading();
 
  private:
   RenderFrameProxy(int routing_id);
 
   void Init(blink::WebRemoteFrame* frame,
             RenderViewImpl* render_view,
             RenderWidget* render_widget);
@@ skipping 36 matching lines @@
 
   RenderViewImpl* render_view_;
   RenderWidget* render_widget_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameProxy);
 };
 
 }  // namespace
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_PROXY_H_