Revert "content: Remove use of MessageLoopProxy and deprecated MessageLoop APIs"

content/browser/renderer_host/media/audio_input_device_manager_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/location.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/single_thread_task_runner.h"
+#include "base/message_loop/message_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/renderer_host/media/audio_input_device_manager.h"
 #include "content/public/common/media_stream_request.h"
 #include "media/audio/audio_manager_base.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::_;
 using testing::InSequence;
@@ skipping 43 matching lines @@
     // Wait for audio thread initialization to complete.  Otherwise the
     // enumeration type may not have been set yet.
     base::WaitableEvent event(false, false);
     audio_manager_->GetTaskRunner()->PostTask(FROM_HERE, base::Bind(
         &base::WaitableEvent::Signal, base::Unretained(&event)));
     event.Wait();
     manager_ = new AudioInputDeviceManager(audio_manager_.get());
     manager_->UseFakeDevice();
     audio_input_listener_.reset(new MockAudioInputDeviceManagerListener());
     manager_->Register(audio_input_listener_.get(),
-                       message_loop_->task_runner().get());
+                       message_loop_->message_loop_proxy().get());
 
     // Gets the enumerated device list from the AudioInputDeviceManager.
     manager_->EnumerateDevices(MEDIA_DEVICE_AUDIO_CAPTURE);
     EXPECT_CALL(*audio_input_listener_,
                 DevicesEnumerated(MEDIA_DEVICE_AUDIO_CAPTURE, _))
         .Times(1)
         .WillOnce(SaveArg<1>(&devices_));
 
     // Wait until we get the list.
     message_loop_->RunUntilIdle();
@@ skipping 194 matching lines @@
   DCHECK(!info);
 
   manager_->Close(session_id);
   EXPECT_CALL(*audio_input_listener_,
               Closed(MEDIA_DEVICE_AUDIO_CAPTURE, session_id))
       .Times(1);
   message_loop_->RunUntilIdle();
 }
 
 }  // namespace content