Consolidate volume control code.

ash/accelerators/accelerator_controller.h

 // 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.
 
 #ifndef ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_H_
 #define ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_H_
 
 #include <map>
 #include <set>
 
@@ skipping 65 matching lines @@
   void SetBrightnessControlDelegate(
       scoped_ptr<BrightnessControlDelegate> brightness_control_delegate);
   void SetCapsLockDelegate(scoped_ptr<CapsLockDelegate> caps_lock_delegate);
   void SetImeControlDelegate(
       scoped_ptr<ImeControlDelegate> ime_control_delegate);
   void SetKeyboardBrightnessControlDelegate(
       scoped_ptr<KeyboardBrightnessControlDelegate>
       keyboard_brightness_control_delegate);
   void SetScreenshotDelegate(
       scoped_ptr<ScreenshotDelegate> screenshot_delegate);
-  void SetVolumeControlDelegate(
-      scoped_ptr<VolumeControlDelegate> volume_control_delegate);
-
   BrightnessControlDelegate* brightness_control_delegate() const {
     return brightness_control_delegate_.get();
   }
 
-  VolumeControlDelegate* volume_control_delegate() const {
-    return volume_control_delegate_.get();
-  }
-
  private:
   // Initializes the accelerators this class handles as a target.
   void Init();
 
   // Switches to a 0-indexed (in order of creation) window.
   // A negative index switches to the last window in the list.
   void SwitchToWindow(int window);
 
   // Registers the specified accelerators.
   void RegisterAccelerators(const AcceleratorData accelerators[],
                             size_t accelerators_length);
 
   scoped_ptr<ui::AcceleratorManager> accelerator_manager_;
 
   // TODO(derat): BrightnessControlDelegate is also used by the system tray;
   // move it outside of this class.
   scoped_ptr<BrightnessControlDelegate> brightness_control_delegate_;
   scoped_ptr<CapsLockDelegate> caps_lock_delegate_;
   scoped_ptr<ImeControlDelegate> ime_control_delegate_;
   scoped_ptr<KeyboardBrightnessControlDelegate>
       keyboard_brightness_control_delegate_;
   scoped_ptr<ScreenshotDelegate> screenshot_delegate_;
-  scoped_ptr<VolumeControlDelegate> volume_control_delegate_;
 
   // A map from accelerators to the AcceleratorAction values, which are used in
   // the implementation.
   std::map<ui::Accelerator, int> accelerators_;
 
   // Actions allowed when the user is not signed in.
   std::set<int> actions_allowed_at_login_screen_;
   // Actions allowed when the screen is locked.
   std::set<int> actions_allowed_at_lock_screen_;
   // Reserved actions. See accelerator_table.h for details.
   std::set<int> reserved_actions_;
 
   DISALLOW_COPY_AND_ASSIGN(AcceleratorController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_H_