Move IPC::MessageFilter and router to a separate file

content/child/power_monitor_broadcast_source.cc

 // 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.
 
 #include "content/child/power_monitor_broadcast_source.h"
 
 #include "base/message_loop/message_loop.h"
 #include "content/common/power_monitor_messages.h"
+#include "ipc/message_filter.h"
 
 namespace content {
 
-class PowerMessageFilter : public IPC::ChannelProxy::MessageFilter {
+class PowerMessageFilter : public IPC::MessageFilter {
  public:
   PowerMessageFilter(
       PowerMonitorBroadcastSource* source,
       scoped_refptr<base::MessageLoopProxy> message_loop)
       : source_(source),
         message_loop_(message_loop) {
   }
 
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE {
     bool handled = true;
@@ skipping 53 matching lines @@
 PowerMonitorBroadcastSource::PowerMonitorBroadcastSource()
     : last_reported_battery_power_state_(false) {
   message_filter_ = new PowerMessageFilter(this,
       base::MessageLoopProxy::current());
 }
 
 PowerMonitorBroadcastSource::~PowerMonitorBroadcastSource() {
   message_filter_->RemoveSource();
 }
 
-IPC::ChannelProxy::MessageFilter*
-PowerMonitorBroadcastSource::GetMessageFilter() {
+IPC::MessageFilter* PowerMonitorBroadcastSource::GetMessageFilter() {
   return message_filter_.get();
 }
 
 bool PowerMonitorBroadcastSource::IsOnBatteryPowerImpl() {
   return last_reported_battery_power_state_;
 }
 
 void PowerMonitorBroadcastSource::OnPowerStateChange(bool on_battery_power) {
   last_reported_battery_power_state_ = on_battery_power;
   ProcessPowerEvent(PowerMonitorSource::POWER_STATE_EVENT);
 }
 
 void PowerMonitorBroadcastSource::OnSuspend() {
   ProcessPowerEvent(PowerMonitorSource::SUSPEND_EVENT);
 }
 
 void PowerMonitorBroadcastSource::OnResume() {
   ProcessPowerEvent(PowerMonitorSource::RESUME_EVENT);
 }
 
 }  // namespace content