Move IPC::MessageFilter and router to a separate file

content/common/child_process_host_impl.h

 // Copyright (c) 2012 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_COMMON_CHILD_PROCESS_HOST_IMPL_H_
 #define CONTENT_COMMON_CHILD_PROCESS_HOST_IMPL_H_
 
 #include <string>
 #include <vector>
 
 #include "build/build_config.h"
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/memory/singleton.h"
 #include "base/strings/string16.h"
 #include "content/public/common/child_process_host.h"
 #include "ipc/ipc_listener.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace gfx {
 struct GpuMemoryBufferHandle;
 }
 
+namespace IPC {
+class MessageFilter;
+}
+
 namespace content {
 class ChildProcessHostDelegate;
 
 // Provides common functionality for hosting a child process and processing IPC
 // messages between the host and the child process. Users are responsible
 // for the actual launching and terminating of the child processes.
 class CONTENT_EXPORT ChildProcessHostImpl : public ChildProcessHost,
                                             public IPC::Listener {
  public:
   virtual ~ChildProcessHostImpl();
@@ skipping 12 matching lines @@
   // but normally this will be used on the IO thread.
   //
   // This will never return ChildProcessHost::kInvalidUniqueID.
   static int GenerateChildProcessUniqueId();
 
   // ChildProcessHost implementation
   virtual bool Send(IPC::Message* message) OVERRIDE;
   virtual void ForceShutdown() OVERRIDE;
   virtual std::string CreateChannel() OVERRIDE;
   virtual bool IsChannelOpening() OVERRIDE;
-  virtual void AddFilter(IPC::ChannelProxy::MessageFilter* filter) OVERRIDE;
+  virtual void AddFilter(IPC::MessageFilter* filter) OVERRIDE;
 #if defined(OS_POSIX)
   virtual int TakeClientFileDescriptor() OVERRIDE;
 #endif
 
  private:
   friend class ChildProcessHost;
 
   explicit ChildProcessHostImpl(ChildProcessHostDelegate* delegate);
 
   // IPC::Listener methods:
@@ skipping 12 matching lines @@
 
   ChildProcessHostDelegate* delegate_;
   base::ProcessHandle peer_handle_;
   bool opening_channel_;  // True while we're waiting the channel to be opened.
   scoped_ptr<IPC::Channel> channel_;
   std::string channel_id_;
 
   // Holds all the IPC message filters.  Since this object lives on the IO
   // thread, we don't have a IPC::ChannelProxy and so we manage filters
   // manually.
-  std::vector<scoped_refptr<IPC::ChannelProxy::MessageFilter> > filters_;
+  std::vector<scoped_refptr<IPC::MessageFilter> > filters_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_CHILD_PROCESS_HOST_IMPL_H_