Eliminate ash::internal namespace

ash/system/chromeos/audio/tray_audio_chromeos.cc

 // Copyright 2014 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 "ash/system/chromeos/audio/tray_audio_chromeos.h"
 
 #include "ash/metrics/user_metrics_recorder.h"
 #include "ash/shell.h"
 #include "ash/system/audio/volume_view.h"
 #include "ash/system/chromeos/audio/audio_detailed_view.h"
 #include "ash/system/chromeos/audio/tray_audio_delegate_chromeos.h"
 #include "ui/views/view.h"
 
 namespace ash {
 
 using system::TrayAudioDelegate;
 using system::TrayAudioDelegateChromeOs;
 
-namespace internal {
-
 TrayAudioChromeOs::TrayAudioChromeOs(SystemTray* system_tray)
     : TrayAudio(system_tray,
                 scoped_ptr<TrayAudioDelegate>(new TrayAudioDelegateChromeOs())),
       audio_detail_view_(NULL) {
 }
 
 TrayAudioChromeOs::~TrayAudioChromeOs() {
 }
 
 void TrayAudioChromeOs::Update() {
@@ skipping 18 matching lines @@
 
 void TrayAudioChromeOs::DestroyDetailedView() {
   if (audio_detail_view_) {
     audio_detail_view_ = NULL;
   } else if (volume_view_) {
     volume_view_ = NULL;
     pop_up_volume_view_ = false;
   }
 }
 
-}  // namespace internal
 }  // namespace ash