Separate out IPC::Message::Sender and channel::Listener into a separate class.

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index bdb0fd9f9ceb37f51786afdda4da05f3cc77cfcc..db4a6e0c073e6c34d3db96b16fe4606d10e1e62e 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -95,10 +95,10 @@ class CONTENT_EXPORT RenderProcessHostImpl
   virtual base::TimeDelta GetChildProcessIdleTime() const OVERRIDE;
   virtual void SurfaceUpdated(int32 surface_id) OVERRIDE;
 
-  // IPC::Channel::Sender via RenderProcessHost.
+  // IPC::MessageSender via RenderProcessHost.
   virtual bool Send(IPC::Message* msg) OVERRIDE;
 
-  // IPC::Channel::Listener via RenderProcessHost.
+  // IPC::ChannelListener via RenderProcessHost.
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
   virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
   virtual void OnChannelError() OVERRIDE;