[Experimental] Supporting OOPIF printing

content/renderer/render_frame_proxy.cc

 // 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.
 
 #include "content/renderer/render_frame_proxy.h"
 
 #include <stdint.h>
 #include <map>
 #include <utility>
 
@@ skipping 515 matching lines @@
 void RenderFrameProxy::advanceFocus(blink::WebFocusType type,
                                     blink::WebLocalFrame* source) {
   int source_routing_id = RenderFrameImpl::FromWebFrame(source)->GetRoutingID();
   Send(new FrameHostMsg_AdvanceFocus(routing_id_, type, source_routing_id));
 }
 
 void RenderFrameProxy::frameFocused() {
   Send(new FrameHostMsg_FrameFocused(routing_id_));
 }
 
+int RenderFrameProxy::print(const blink::WebRect& rect, int page_num) {
+  gfx::Rect r = rect;
+  Send(new FrameHostMsg_PrintRemoteFrame(routing_id_, r, page_num));
+  return routing_id_;
+}
+
 }  // namespace