Move media/audio files into media namespace

media/audio/audio_input_volume_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 <cmath>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/win/scoped_com_initializer.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_manager_base.h"
 #include "media/audio/audio_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::win::ScopedCOMInitializer;
-using media::AudioDeviceNames;
+
+namespace media {
 
 class AudioInputVolumeTest : public ::testing::Test {
  protected:
   AudioInputVolumeTest()
       : audio_manager_(AudioManager::Create()),
         com_init_(ScopedCOMInitializer::kMTA) {
   }
 
   bool CanRunAudioTests() {
 #if defined(OS_WIN)
@@ skipping 124 matching lines @@
     EXPECT_NEAR(current_volume, new_volume, 0.25 * max_volume);
 
     // Restores the volume to the original value.
     ais->SetVolume(original_volume);
     current_volume = ais->GetVolume();
     EXPECT_EQ(original_volume, current_volume);
 
     ais->Close();
   }
 }
+
+}  // namespace media