chromeos: Combine TrayAudio and TrayAudioChromeOs classes

ash/common/system/chromeos/audio/volume_view.h

Index: ash/common/system/chromeos/audio/volume_view.h
diff --git a/ash/common/system/audio/volume_view.h b/ash/common/system/chromeos/audio/volume_view.h
similarity index 88%
rename from ash/common/system/audio/volume_view.h
rename to ash/common/system/chromeos/audio/volume_view.h
index 3eba8b5705930cb938b17138a9be71d226a35f5c..6e4b428b204750bfea8d0cd0750ce6b928ead7ce 100644
--- a/ash/common/system/audio/volume_view.h
+++ b/ash/common/system/chromeos/audio/volume_view.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_COMMON_SYSTEM_AUDIO_VOLUME_VIEW_H_
-#define ASH_COMMON_SYSTEM_AUDIO_VOLUME_VIEW_H_
+#ifndef ASH_COMMON_SYSTEM_CHROMEOS_AUDIO_VOLUME_VIEW_H_
+#define ASH_COMMON_SYSTEM_CHROMEOS_AUDIO_VOLUME_VIEW_H_
 
 #include "ash/common/system/tray/actionable_view.h"
 #include "base/macros.h"
@@ -28,8 +28,7 @@ class TrayAudioDelegate;
 namespace tray {
 class VolumeButton;
 
-class VolumeView : public ActionableView,
-                   public views::SliderListener {
+class VolumeView : public ActionableView, public views::SliderListener {
  public:
   VolumeView(SystemTrayItem* owner,
              system::TrayAudioDelegate* audio_delegate,
@@ -77,4 +76,4 @@ class VolumeView : public ActionableView,
 }  // namespace tray
 }  // namespace ash
 
-#endif  // ASH_COMMON_SYSTEM_AUDIO_VOLUME_VIEW_H_
+#endif  // ASH_COMMON_SYSTEM_CHROMEOS_AUDIO_VOLUME_VIEW_H_