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

ash/common/system/tray/throbber_view.h

-// Copyright (c) 2013 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_THROBBER_VIEW_H_
-#define ASH_COMMON_SYSTEM_TRAY_THROBBER_VIEW_H_
-
-#include "base/macros.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/views/controls/throbber.h"
-#include "ui/views/view.h"
-
-namespace ash {
-
-// A SmoothedThrobber with tooltip.
-class SystemTrayThrobber : public views::SmoothedThrobber {
- public:
-  SystemTrayThrobber();
-  ~SystemTrayThrobber() override;
-
-  void SetTooltipText(const base::string16& tooltip_text);
-
-  // Overriden from views::View.
-  bool GetTooltipText(const gfx::Point& p,
-                      base::string16* tooltip) const override;
-
- private:
-  // The current tooltip text.
-  base::string16 tooltip_text_;
-
-  DISALLOW_COPY_AND_ASSIGN(SystemTrayThrobber);
-};
-
-// A View containing a SystemTrayThrobber with animation for starting/stopping.
-class ThrobberView : public views::View {
- public:
-  ThrobberView();
-  ~ThrobberView() override;
-
-  void Start();
-  void Stop();
-  void SetTooltipText(const base::string16& tooltip_text);
-
-  // Overriden from views::View.
-  gfx::Size GetPreferredSize() const override;
-  void Layout() override;
-  bool GetTooltipText(const gfx::Point& p,
-                      base::string16* tooltip) const override;
-
- private:
-  // Schedules animation for starting/stopping throbber.
-  void ScheduleAnimation(bool start_throbber);
-
-  SystemTrayThrobber* throbber_;
-
-  // The current tooltip text.
-  base::string16 tooltip_text_;
-
-  DISALLOW_COPY_AND_ASSIGN(ThrobberView);
-};
-
-}  // namespace ash
-
-#endif  // ASH_COMMON_SYSTEM_TRAY_THROBBER_VIEW_H_