Move MessageLoop to base namespace.

ui/compositor/test/test_suite.h

 // 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.
 
 #ifndef UI_COMPOSITOR_TEST_TEST_SUITE_H_
 #define UI_COMPOSITOR_TEST_TEST_SUITE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/test/test_suite.h"
 
+namespace base {
 class MessageLoop;
+}
 
 namespace ui {
 namespace test {
 
 class CompositorTestSuite : public base::TestSuite {
  public:
   CompositorTestSuite(int argc, char** argv);
   virtual ~CompositorTestSuite();
 
  protected:
   // Overridden from base::TestSuite:
   virtual void Initialize() OVERRIDE;
   virtual void Shutdown() OVERRIDE;
 
  private:
-  scoped_ptr<MessageLoop> message_loop_;
+  scoped_ptr<base::MessageLoop> message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorTestSuite);
 };
 
 }  // namespace test
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_TEST_TEST_SUITE_H_