chromeos: Move files in //ash/common to //ash, part 1

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

-// 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_SYSTEM_CHROMEOS_AUDIO_VOLUME_VIEW_H_
-#define ASH_COMMON_SYSTEM_CHROMEOS_AUDIO_VOLUME_VIEW_H_
-
-#include "base/macros.h"
-#include "ui/views/controls/button/button.h"
-#include "ui/views/controls/slider.h"
-#include "ui/views/view.h"
-
-namespace views {
-class CustomButton;
-class ImageView;
-}
-
-namespace ash {
-class SystemTrayItem;
-class TriView;
-
-namespace system {
-class TrayAudioDelegate;
-}
-
-namespace tray {
-class VolumeButton;
-
-class VolumeView : public views::View,
-                   public views::SliderListener,
-                   public views::ButtonListener {
- public:
-  VolumeView(SystemTrayItem* owner,
-             system::TrayAudioDelegate* audio_delegate,
-             bool is_default_view);
-
-  ~VolumeView() override;
-
-  void Update();
-
-  // Sets volume level on slider_, |percent| is ranged from [0.00] to [1.00].
-  void SetVolumeLevel(float percent);
-
- private:
-  // Updates device_type_ icon and more_ button.
-  void UpdateDeviceTypeAndMore();
-  void HandleVolumeUp(int percent);
-  void HandleVolumeDown(int percent);
-
-  // SliderListener:
-  void SliderValueChanged(views::Slider* sender,
-                          float value,
-                          float old_value,
-                          views::SliderChangeReason reason) override;
-
-  // views::ButtonListener:
-  void ButtonPressed(views::Button* sender, const ui::Event& event) override;
-
-  SystemTrayItem* owner_;
-  // The only immediate child view of |this|. All other view elements are added
-  // to the |tri_view_| to handle layout.
-  TriView* tri_view_;
-  system::TrayAudioDelegate* audio_delegate_;
-  views::CustomButton* more_button_;
-  VolumeButton* icon_;
-  views::Slider* slider_;
-  views::ImageView* device_type_;
-  bool is_default_view_;
-
-  DISALLOW_COPY_AND_ASSIGN(VolumeView);
-};
-
-}  // namespace tray
-}  // namespace ash
-
-#endif  // ASH_COMMON_SYSTEM_CHROMEOS_AUDIO_VOLUME_VIEW_H_