Consolidate volume control code.

ash/accelerators/accelerator_controller_unittest.cc

 // 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.
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_table.h"
 #include "ash/caps_lock_delegate.h"
 #include "ash/ime_control_delegate.h"
 #include "ash/screenshot_delegate.h"
 #include "ash/shell.h"
@@ skipping 126 matching lines @@
     last_accelerator_ = accelerator;
     return consume_;
   }
   virtual bool HandleVolumeUp(const ui::Accelerator& accelerator) OVERRIDE {
     ++handle_volume_up_count_;
     last_accelerator_ = accelerator;
     return consume_;
   }
   virtual void SetVolumePercent(double percent) OVERRIDE {
   }
+  virtual bool IsAudioMuted() const OVERRIDE {
+    return false;
+  }
+  virtual void SetAudioMuted(bool muted) OVERRIDE {
+  }
+  virtual float GetVolumeLevel() const OVERRIDE {
+    return 0.0;
+  }
+  virtual void SetVolumeLevel(float level) OVERRIDE {
+  }
 
   int handle_volume_mute_count() const {
     return handle_volume_mute_count_;
   }
   int handle_volume_down_count() const {
     return handle_volume_down_count_;
   }
   int handle_volume_up_count() const {
     return handle_volume_up_count_;
   }
@@ skipping 822 matching lines @@
   EXPECT_FALSE(GetController()->IsReservedAccelerator(
       ui::Accelerator(ui::VKEY_PRINT, ui::EF_NONE)));
   EXPECT_FALSE(GetController()->IsReservedAccelerator(
       ui::Accelerator(ui::VKEY_TAB, ui::EF_NONE)));
   EXPECT_FALSE(GetController()->IsReservedAccelerator(
       ui::Accelerator(ui::VKEY_A, ui::EF_NONE)));
 }
 
 }  // namespace test
 }  // namespace ash