Use base::MessageLoop in more files.

content/public/renderer/content_renderer_client.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/public/renderer/content_renderer_client.h"
 
 namespace content {
 
 SkBitmap* ContentRendererClient::GetSadPluginBitmap() {
   return NULL;
@@ skipping 142 matching lines @@
     const GURL& first_party_for_cookies,
     const std::string& value) {
   return false;
 }
 
 bool ContentRendererClient::AllowBrowserPlugin(
     WebKit::WebPluginContainer* container) const {
   return false;
 }
 
-MessageLoop* ContentRendererClient::OverrideCompositorMessageLoop() const {
+base::MessageLoop* ContentRendererClient::OverrideCompositorMessageLoop()
+    const {
   return NULL;
 }
 
 bool ContentRendererClient::ShouldCreateCompositorInputHandler() const {
   return true;
 }
 
 }  // namespace content