Move IPC::MessageFilter and router to a separate file

content/child/child_message_filter.cc

 // 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.
 
 #include "content/child/child_message_filter.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/location.h"
 #include "base/task_runner.h"
 #include "content/child/child_thread.h"
 #include "content/child/thread_safe_sender.h"
+#include "ipc/message_filter.h"
 
 namespace content {
 
-class ChildMessageFilter::Internal : public IPC::ChannelProxy::MessageFilter {
+class ChildMessageFilter::Internal : public IPC::MessageFilter {
  public:
   explicit Internal(ChildMessageFilter* filter) : filter_(filter) {}
 
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE {
     scoped_refptr<base::TaskRunner> runner =
         filter_->OverrideTaskRunnerForMessage(msg);
     if (runner && !runner->RunsTasksOnCurrentThread()) {
       if (!runner->PostTask(
               FROM_HERE,
               base::Bind(
@@ skipping 21 matching lines @@
     const IPC::Message& msg) {
   return NULL;
 }
 
 ChildMessageFilter::ChildMessageFilter()
     : internal_(NULL),
       thread_safe_sender_(ChildThread::current()->thread_safe_sender()) {}
 
 ChildMessageFilter::~ChildMessageFilter() {}
 
-IPC::ChannelProxy::MessageFilter* ChildMessageFilter::GetFilter() {
+IPC::MessageFilter* ChildMessageFilter::GetFilter() {
   if (!internal_)
     internal_ = new Internal(this);
   return internal_;
 }
 
 }  // namespace content