Remove Ash shelf dimmer.

ash/shelf/dimmer_view.h

-// Copyright 2016 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_SHELF_DIMMER_VIEW_H_
-#define ASH_SHELF_DIMMER_VIEW_H_
-
-#include "ash/common/shelf/wm_dimmer_view.h"
-#include "ash/common/wm/background_animator.h"
-#include "ash/common/wm_window_observer.h"
-#include "base/macros.h"
-#include "ui/events/event_handler.h"
-#include "ui/views/view.h"
-#include "ui/views/widget/widget_delegate.h"
-
-namespace ash {
-
-class WmShelf;
-
-// DimmerView slightly dims shelf items when a window is maximized and visible.
-// TODO(jamescook): Delete this after material design ships, as MD will not
-// require shelf dimming. http://crbug.com/614453
-class DimmerView : public views::View,
-                   public views::WidgetDelegate,
-                   public BackgroundAnimatorDelegate,
-                   public WmDimmerView,
-                   public WmWindowObserver {
- public:
-  // Creates and shows a DimmerView and its Widget. The returned view is owned
-  // by its widget. If |disable_animations_for_test| is set, all changes apply
-  // instantly.
-  static DimmerView* Create(WmShelf* shelf, bool disable_animations_for_test);
-
-  // Called by |DimmerEventFilter| when the mouse |hovered| state changes.
-  void SetHovered(bool hovered);
-
-  // views::View overrides:
-  void OnPaintBackground(gfx::Canvas* canvas) override;
-
-  // views::WidgetDelegate overrides:
-  views::Widget* GetWidget() override;
-  const views::Widget* GetWidget() const override;
-
-  // BackgroundAnimatorDelegate overrides:
-  void UpdateBackground(BackgroundAnimator* animator, int alpha) override;
-  void BackgroundAnimationEnded(BackgroundAnimator* animator) override;
-
-  // WmDimmerView:
-  views::Widget* GetDimmerWidget() override;
-  void ForceUndimming(bool force) override;
-  int GetDimmingAlphaForTest() override;
-
-  // WmWindowObserver overrides:
-  // This will be called when the shelf itself changes its absolute position.
-  // Since the |dimmer_| panel needs to be placed in screen coordinates it needs
-  // to be repositioned. The difference to the OnBoundsChanged call above is
-  // that this gets also triggered when the shelf only moves.
-  void OnWindowBoundsChanged(WmWindow* window,
-                             const gfx::Rect& old_bounds,
-                             const gfx::Rect& new_bounds) override;
-
- private:
-  DimmerView(WmShelf* shelf, bool disable_animations_for_test);
-  ~DimmerView() override;
-
-  // This class monitors mouse events to see if it is on top of the shelf.
-  class DimmerEventFilter : public ui::EventHandler {
-   public:
-    explicit DimmerEventFilter(DimmerView* owner);
-    ~DimmerEventFilter() override;
-
-    // Overridden from ui::EventHandler:
-    void OnMouseEvent(ui::MouseEvent* event) override;
-    void OnTouchEvent(ui::TouchEvent* event) override;
-
-   private:
-    // The owning class.
-    DimmerView* owner_;
-
-    // True if the mouse is inside the shelf.
-    bool mouse_inside_;
-
-    // True if a touch event is inside the shelf.
-    bool touch_inside_;
-
-    DISALLOW_COPY_AND_ASSIGN(DimmerEventFilter);
-  };
-
-  // The shelf that uses this dimmer.
-  WmShelf* shelf_;
-
-  // The alpha to use for covering the shelf.
-  int alpha_;
-
-  // True if the event filter claims that we should not be dimmed.
-  bool is_hovered_;
-
-  // True if someone forces us not to be dimmed (e.g. a menu is open).
-  bool force_hovered_;
-
-  // True if animations should be suppressed for a test.
-  bool disable_animations_for_test_;
-
-  // The animator for the background transitions.
-  BackgroundAnimator background_animator_;
-
-  // Notification of entering / exiting of the shelf area by mouse.
-  std::unique_ptr<DimmerEventFilter> event_filter_;
-
-  DISALLOW_COPY_AND_ASSIGN(DimmerView);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SHELF_DIMMER_VIEW_H_