mash: Migrate shelf app list button to wm common types

ash/shelf/app_list_button.h

-// Copyright 2014 The Chromium Authors. All rights reserved.

[James Cook, 2016/07/20 17:00:06]

I don't know why Reitveld shows these as modified and not deleted, but since
it's all git under the hood it shouldn't matter.

[msw, 2016/07/20 17:33:49]

Acknowledged.

-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef ASH_SHELF_APP_LIST_BUTTON_H_
-#define ASH_SHELF_APP_LIST_BUTTON_H_
-
-#include "ash/ash_export.h"
-#include "base/macros.h"
-#include "ui/views/controls/button/image_button.h"
-
-namespace ash {
-class InkDropButtonListener;
-class ShelfView;
-
-// Button used for the AppList icon on the shelf.
-class ASH_EXPORT AppListButton : public views::ImageButton {
- public:
-  explicit AppListButton(InkDropButtonListener* listener,
-                         ShelfView* shelf_view);
-  ~AppListButton() override;
-
-  void OnAppListShown();
-  void OnAppListDismissed();
-
-  bool draw_background_as_active() { return draw_background_as_active_; }
-
- protected:
-  // views::ImageButton overrides:
-  bool OnMousePressed(const ui::MouseEvent& event) override;
-  void OnMouseReleased(const ui::MouseEvent& event) override;
-  void OnMouseCaptureLost() override;
-  bool OnMouseDragged(const ui::MouseEvent& event) override;
-  void OnPaint(gfx::Canvas* canvas) override;
-  void GetAccessibleState(ui::AXViewState* state) override;
-  std::unique_ptr<views::InkDropRipple> CreateInkDropRipple() const override;
-  void NotifyClick(const ui::Event& event) override;
-  bool ShouldEnterPushedState(const ui::Event& event) override;
-  bool ShouldShowInkDropHighlight() const override;
-
-  // ui::EventHandler overrides:
-  void OnGestureEvent(ui::GestureEvent* event) override;
-
- private:
-  // Toggles the active state for painting the background and schedules a paint.
-  void SetDrawBackgroundAsActive(bool draw_background_as_active);
-
-  // Helper functions to paint the background and foreground of the AppList
-  // button in Chrome OS MD.
-  void PaintBackgroundMD(gfx::Canvas* canvas);
-  void PaintForegroundMD(gfx::Canvas* canvas,
-                         const gfx::ImageSkia& foreground_image);
-
-  // Helper function to paint the AppList button in Chrome OS non-MD.
-  void PaintAppListButton(gfx::Canvas* canvas,
-                          const gfx::ImageSkia& foreground_image);
-
-  // True if the background should render as active, regardless of the state of
-  // the application list.
-  bool draw_background_as_active_;
-
-  InkDropButtonListener* listener_;
-  ShelfView* shelf_view_;
-
-  DISALLOW_COPY_AND_ASSIGN(AppListButton);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SHELF_APP_LIST_BUTTON_H_