Use base::MessageLoop in more files.

content/browser/renderer_host/media/media_stream_dispatcher_host_unittest.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 <string>
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/renderer_host/media/media_stream_dispatcher_host.h"
@@ skipping 124 matching lines @@
   MediaStreamDispatcherHostTest() : old_browser_client_(NULL) {}
   virtual ~MediaStreamDispatcherHostTest() {}
 
   void WaitForResult() {
     message_loop_->Run();
   }
 
  protected:
   virtual void SetUp() OVERRIDE {
     // MediaStreamManager must be created and called on IO thread.
-    message_loop_.reset(new MessageLoop(base::MessageLoop::TYPE_IO));
+    message_loop_.reset(new base::MessageLoop(base::MessageLoop::TYPE_IO));
     ui_thread_.reset(new TestBrowserThread(BrowserThread::UI,
                                            message_loop_.get()));
     io_thread_.reset(new TestBrowserThread(BrowserThread::IO,
                                            message_loop_.get()));
 
     // Create our own MediaStreamManager.
     audio_manager_.reset(media::AudioManager::Create());
     media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
     // Make sure we use fake devices to avoid long delays.
     media_stream_manager_->UseFakeDevice();
@@ skipping 193 matching lines @@
   EXPECT_EQ(host_->NumberOfStreams(), 1u);
 
   ASSERT_FALSE(close_callback.is_null());
   close_callback.Run();
   message_loop_->RunUntilIdle();
 
   EXPECT_EQ(host_->NumberOfStreams(), 0u);
 }
 
 };  // namespace content