Use mojo volume interfaces for mash and classic ash.

ash/common/test/test_volume_control_delegate.h

Index: ash/common/test/test_volume_control_delegate.h
diff --git a/ash/common/test/test_volume_control_delegate.h b/ash/common/test/test_volume_control_delegate.h
deleted file mode 100644
index 6f8bb9409a708ab6367ff4ae82c27534b1c67663..0000000000000000000000000000000000000000
--- a/ash/common/test/test_volume_control_delegate.h
+++ /dev/null
@@ -1,46 +0,0 @@
-// 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.
-
-#ifndef ASH_COMMON_TEST_TEST_VOLUME_CONTROL_DELEGATE_H_
-#define ASH_COMMON_TEST_TEST_VOLUME_CONTROL_DELEGATE_H_
-
-#include "ash/common/system/volume_control_delegate.h"
-#include "base/macros.h"
-#include "ui/base/accelerators/accelerator.h"
-
-namespace ash {
-
-// A simple test double for a VolumeControlDelegate
-// Will count the number of times the HandleVolumeMute, HandleVolumeDown and
-// HandleVolumeUp methods are invoked.
-class TestVolumeControlDelegate : public ash::VolumeControlDelegate {
- public:
-  TestVolumeControlDelegate();
-  ~TestVolumeControlDelegate() 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_; }
-
-  const ui::Accelerator& last_accelerator() const { return last_accelerator_; }
-
-  // ash::VolumeControlDelegate:
-  void HandleVolumeMute(const ui::Accelerator& accelerator) override;
-  void HandleVolumeDown(const ui::Accelerator& accelerator) override;
-  void HandleVolumeUp(const ui::Accelerator& accelerator) override;
-
- private:
-  int handle_volume_mute_count_;
-  int handle_volume_down_count_;
-  int handle_volume_up_count_;
-  ui::Accelerator last_accelerator_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestVolumeControlDelegate);
-};
-
-}  // namespace ash
-
-#endif  // ASH_COMMON_TEST_TEST_VOLUME_CONTROL_DELEGATE_H_