mash: Migrate tray audio and deps to common.

ash/common/system/tray/wm_system_tray_notifier.h

 // Copyright 2016 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.
 
 #ifndef ASH_COMMON_SYSTEM_TRAY_WM_SYSTEM_TRAY_NOTIFIER_H_
 #define ASH_COMMON_SYSTEM_TRAY_WM_SYSTEM_TRAY_NOTIFIER_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/accessibility_types.h"
 #include "ash/common/system/locale/locale_observer.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 
 namespace ash {
 
 class AccessibilityObserver;
+class AudioObserver;
 class ClockObserver;
 class IMEObserver;
 struct UpdateInfo;
 class UpdateObserver;
 
 #if defined(OS_CHROMEOS)
 class VirtualKeyboardObserver;
 #endif
 
 // Observer and notification manager for the ash system tray. This version
 // contains the observers that have been ported to //ash/common. See also
 // ash::SystemTrayNotifier.
 // TODO(jamescook): After all the observers have been moved, rename this class
 // to SystemTrayNotifier.
 class ASH_EXPORT WmSystemTrayNotifier {
  public:
   WmSystemTrayNotifier();
   ~WmSystemTrayNotifier();
 
   // Accessibility.
   void AddAccessibilityObserver(AccessibilityObserver* observer);
   void RemoveAccessibilityObserver(AccessibilityObserver* observer);
   void NotifyAccessibilityModeChanged(
       AccessibilityNotificationVisibility notify);
 
+  // Audio.
+  void AddAudioObserver(AudioObserver* observer);
+  void RemoveAudioObserver(AudioObserver* observer);
+  void NotifyAudioOutputVolumeChanged(uint64_t node_id, double volume);
+  void NotifyAudioOutputMuteChanged(bool mute_on, bool system_adjust);
+  void NotifyAudioNodesChanged();
+  void NotifyAudioActiveOutputNodeChanged();
+  void NotifyAudioActiveInputNodeChanged();
+
   // Date and time.
   void AddClockObserver(ClockObserver* observer);
   void RemoveClockObserver(ClockObserver* observer);
   void NotifyRefreshClock();
   void NotifyDateFormatChanged();
   void NotifySystemClockTimeUpdated();
   void NotifySystemClockCanSetTimeChanged(bool can_set_time);
 
   // Input methods.
   void AddIMEObserver(IMEObserver* observer);
@@ skipping 16 matching lines @@
 
 #if defined(OS_CHROMEOS)
   // Virtual keyboard.
   void AddVirtualKeyboardObserver(VirtualKeyboardObserver* observer);
   void RemoveVirtualKeyboardObserver(VirtualKeyboardObserver* observer);
   void NotifyVirtualKeyboardSuppressionChanged(bool suppressed);
 #endif
 
  private:
   base::ObserverList<AccessibilityObserver> accessibility_observers_;
+  base::ObserverList<AudioObserver> audio_observers_;
   base::ObserverList<ClockObserver> clock_observers_;
   base::ObserverList<IMEObserver> ime_observers_;
   base::ObserverList<LocaleObserver> locale_observers_;
   base::ObserverList<UpdateObserver> update_observers_;
 
 #if defined(OS_CHROMEOS)
   base::ObserverList<VirtualKeyboardObserver> virtual_keyboard_observers_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(WmSystemTrayNotifier);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_WM_SYSTEM_TRAY_NOTIFIER_H_