Use base::MessageLoop in more files.

content/browser/gpu/browser_gpu_channel_host_factory.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/browser/gpu/browser_gpu_channel_host_factory.h"
 
 #include "base/bind.h"
 #include "base/threading/thread_restrictions.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
@@ skipping 48 matching lines @@
 }
 
 bool BrowserGpuChannelHostFactory::IsMainThread() {
   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 }
 
 bool BrowserGpuChannelHostFactory::IsIOThread() {
   return BrowserThread::CurrentlyOn(BrowserThread::IO);
 }
 
-MessageLoop* BrowserGpuChannelHostFactory::GetMainLoop() {
+base::MessageLoop* BrowserGpuChannelHostFactory::GetMainLoop() {
   return BrowserThread::UnsafeGetMessageLoopForThread(BrowserThread::UI);
 }
 
 scoped_refptr<base::MessageLoopProxy>
 BrowserGpuChannelHostFactory::GetIOLoopProxy() {
   return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
 }
 
 base::WaitableEvent* BrowserGpuChannelHostFactory::GetShutDownEvent() {
   return shutdown_event_.get();
@@ skipping 233 matching lines @@
   filter->AddRoute(MSG_ROUTING_CONTROL, handler);
 
   GetIOLoopProxy()->PostTask(
       FROM_HERE,
       base::Bind(&BrowserGpuChannelHostFactory::AddFilterOnIO,
                  gpu_host_id_,
                  filter));
 }
 
 }  // namespace content