Move IPC::MessageFilter and router to a separate file

win8/viewer/metro_viewer_process_host.h

 // Copyright (c) 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 WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_
 #define WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/threading/non_thread_safe.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_listener.h"
+#include "ipc/ipc_message_listener.h"
 #include "ipc/ipc_sender.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 class WaitableEvent;
 }
 
 namespace IPC {
+class ChannelProxy;
 class Message;
 }
 
 namespace win8 {
 
 // Abstract base class for various Metro viewer process host implementations.
 class MetroViewerProcessHost : public IPC::Listener,
                                public IPC::Sender,
                                public base::NonThreadSafe {
  public:
@@ skipping 42 matching lines @@
 
   // Called over IPC by the viewer process when the window size has changed.
   virtual void OnWindowSizeChanged(uint32 width, uint32 height) = 0;
 
   void NotifyChannelConnected();
 
   // Inner message filter used to handle connection event on the IPC channel
   // proxy's background thread. This prevents consumers of
   // MetroViewerProcessHost from having to pump messages on their own message
   // loop.
-  class InternalMessageFilter : public IPC::ChannelProxy::MessageFilter {
+  class InternalMessageFilter : public IPC::MessageFilter {
    public:
     InternalMessageFilter(MetroViewerProcessHost* owner);
 
-    // IPC::ChannelProxy::MessageFilter implementation.
+    // IPC::MessageFilter implementation.
     virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
 
    private:
     MetroViewerProcessHost* owner_;
     DISALLOW_COPY_AND_ASSIGN(InternalMessageFilter);
   };
 
   scoped_ptr<IPC::ChannelProxy> channel_;
   scoped_ptr<base::WaitableEvent> channel_connected_event_;
   scoped_refptr<InternalMessageFilter> message_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(MetroViewerProcessHost);
 };
 
 }  // namespace win8
 
 #endif  // WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_