Eliminate ash::internal namespace

ash/system/audio/volume_view.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/audio/volume_view.h"
 
 #include "ash/ash_constants.h"
 #include "ash/shell.h"
 #include "ash/system/audio/tray_audio.h"
 #include "ash/system/audio/tray_audio_delegate.h"
@@ skipping 17 matching lines @@
 const int kExtraPaddingBetweenBarAndMore = 10;
 
 // IDR_AURA_UBER_TRAY_VOLUME_LEVELS contains 5 images,
 // The one for mute is at the 0 index and the other
 // four are used for ascending volume levels.
 const int kVolumeLevels = 4;
 
 }  // namespace
 
 namespace ash {
-namespace internal {
 namespace tray {
 
 class VolumeButton : public views::ToggleImageButton {
  public:
    VolumeButton(views::ButtonListener* listener,
                 system::TrayAudioDelegate* audio_delegate)
       : views::ToggleImageButton(listener),
         audio_delegate_(audio_delegate),
         image_index_(-1) {
     SetImageAlignment(ALIGN_CENTER, ALIGN_MIDDLE);
@@ skipping 272 matching lines @@
 }
 
 bool VolumeView::PerformAction(const ui::Event& event) {
   if (!more_->visible())
     return false;
   owner_->TransitionDetailedView();
   return true;
 }
 
 }  // namespace tray
-}  // namespace internal
 }  // namespace ash