Make RenderFrame{Host} objects routable.

content/browser/renderer_host/render_frame_host_impl.h

 // Copyright 2013 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_BROWSER_RENDERER_HOST_RENDER_FRAME_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_FRAME_HOST_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "content/public/browser/render_frame_host.h"
 
 namespace content {
 
+class RenderProcessHost;
 class RenderViewHostImpl;
 
 class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost {
  public:
-  RenderFrameHostImpl(
-      RenderViewHostImpl* render_view_host,
-      int routing_id,
-      bool swapped_out);
+  static RenderFrameHostImpl* FromID(int process_id, int routing_id);
+
+  RenderFrameHostImpl(RenderViewHostImpl* render_view_host,
+                      int routing_id,
+                      bool is_swapped_out);
   virtual ~RenderFrameHostImpl();
 
   // IPC::Sender
   virtual bool Send(IPC::Message* msg) OVERRIDE;
 
   // IPC::Listener
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
-  int routing_id() { return routing_id_; }
+  void Init();
+  RenderProcessHost* GetProcess() const;
+  int routing_id() const { return routing_id_; }
 
  private:
-  RenderViewHostImpl* render_view_host_;
+  bool is_swapped_out() { return is_swapped_out_; }
 
+  RenderViewHostImpl* render_view_host_;  // Not owned. Outlives this object.
   int routing_id_;
+  bool is_swapped_out_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_FRAME_HOST_IMPL_H_