Use base::MessageLoop in more files.

ui/aura/env.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 "ui/aura/env.h"
 
 #include "base/command_line.h"
 #include "ui/aura/env_observer.h"
 #include "ui/aura/root_window_host.h"
 #include "ui/aura/window.h"
@@ skipping 46 matching lines @@
 
 void Env::AddObserver(EnvObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void Env::RemoveObserver(EnvObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 #if !defined(OS_MACOSX)
-MessageLoop::Dispatcher* Env::GetDispatcher() {
+base::MessageLoop::Dispatcher* Env::GetDispatcher() {
 #if defined(USE_X11)
   return base::MessagePumpAuraX11::Current();
 #else
   return dispatcher_.get();
 #endif
 }
 #endif
 
 void Env::RootWindowActivated(RootWindow* root_window) {
   FOR_EACH_OBSERVER(EnvObserver, observers_,
@@ skipping 31 matching lines @@
 
 bool Env::CanAcceptEvent(const ui::Event& event) {
   return true;
 }
 
 ui::EventTarget* Env::GetParentTarget() {
   return NULL;
 }
 
 }  // namespace aura