Move IPC::MessageFilter and router to a separate file

content/child/child_thread.cc

 // 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.
 
 #include "content/child/child_thread.h"
 
 #include <signal.h>
 
 #include <string>
 
@@ skipping 91 matching lines @@
   // A non joinable thread has been created. The thread will either terminate
   // the process or will be terminated by the process. Therefore, keep the
   // delegate object alive for the lifetime of the process.
   WaitAndExitDelegate* leaking_delegate = delegate.release();
   ANNOTATE_LEAKING_OBJECT_PTR(leaking_delegate);
   ignore_result(leaking_delegate);
   return true;
 }
 #endif
 
-class SuicideOnChannelErrorFilter : public IPC::ChannelProxy::MessageFilter {
+class SuicideOnChannelErrorFilter : public IPC::MessageFilter {
  public:
-  // IPC::ChannelProxy::MessageFilter
+  // IPC::MessageFilter
   virtual void OnChannelError() OVERRIDE {
     // For renderer/worker processes:
     // On POSIX, at least, one can install an unload handler which loops
     // forever and leave behind a renderer process which eats 100% CPU forever.
     //
     // This is because the terminate signals (ViewMsg_ShouldClose and the error
     // from the IPC channel) are routed to the main message loop but never
     // processed (because that message loop is stuck in V8).
     //
     // One could make the browser SIGKILL the renderers, but that leaves open a
@@ skipping 408 matching lines @@
   // inflight that would addref it.
   Send(new ChildProcessHostMsg_ShutdownRequest);
 }
 
 void ChildThread::EnsureConnected() {
   VLOG(0) << "ChildThread::EnsureConnected()";
   base::KillProcess(base::GetCurrentProcessHandle(), 0, false);
 }
 
 }  // namespace content