Revert of AppListController refactoring part 3: Switching over to use AppListShower in Ash.

ash/wm/app_list_controller.h

Index: ash/wm/app_list_controller.h
diff --git a/ash/wm/app_list_controller.h b/ash/wm/app_list_controller.h
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+// Copyright (c) 2012 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_WM_APP_LIST_CONTROLLER_H_
+#define ASH_WM_APP_LIST_CONTROLLER_H_
+
+#include "ash/shelf/shelf_icon_observer.h"
+#include "ash/shell_observer.h"
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "ui/app_list/pagination_model_observer.h"
+#include "ui/aura/client/focus_change_observer.h"
+#include "ui/aura/window_observer.h"
+#include "ui/compositor/layer_animation_observer.h"
+#include "ui/events/event_handler.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/keyboard/keyboard_controller_observer.h"
+#include "ui/views/widget/widget_observer.h"
+
+namespace app_list {
+class ApplicationDragAndDropHost;
+class AppListView;
+}
+
+namespace ui {
+class LocatedEvent;
+}
+
+namespace ash {
+namespace test {
+class AppListControllerTestApi;
+}
+
+// AppListController is a controller that manages app list UI for shell.
+// It creates AppListView and schedules showing/hiding animation.
+// While the UI is visible, it monitors things such as app list widget's
+// activation state and desktop mouse click to auto dismiss the UI.
+class AppListController : public ui::EventHandler,
+                          public aura::client::FocusChangeObserver,
+                          public aura::WindowObserver,
+                          public ui::ImplicitAnimationObserver,
+                          public views::WidgetObserver,
+                          public keyboard::KeyboardControllerObserver,
+                          public ShellObserver,
+                          public ShelfIconObserver,
+                          public app_list::PaginationModelObserver {
+ public:
+  AppListController();
+  ~AppListController() override;
+
+  // Show/hide app list window. The |window| is used to deterime in
+  // which display (in which the |window| exists) the app list should
+  // be shown.
+  void Show(aura::Window* window);
+  void Dismiss();
+
+  // Whether app list window is visible (shown or being shown).
+  bool IsVisible() const;
+
+  // Returns target visibility. This differs from IsVisible() if an animation
+  // is ongoing.
+  bool GetTargetVisibility() const { return is_visible_; }
+
+  // Returns app list window or NULL if it is not visible.
+  aura::Window* GetWindow();
+
+  // Returns app list view if one exists, or NULL otherwise.
+  app_list::AppListView* GetView() { return view_; }
+
+ private:
+  friend class test::AppListControllerTestApi;
+
+  // If |drag_and_drop_host| is not NULL it will be called upon drag and drop
+  // operations outside the application list.
+  void SetDragAndDropHostOfCurrentAppList(
+      app_list::ApplicationDragAndDropHost* drag_and_drop_host);
+
+  // Sets the app list view and attempts to show it.
+  void SetView(app_list::AppListView* view);
+
+  // Forgets the view.
+  void ResetView();
+
+  // Starts show/hide animation.
+  void ScheduleAnimation();
+
+  void ProcessLocatedEvent(ui::LocatedEvent* event);
+
+  // Makes app list bubble update its bounds.
+  void UpdateBounds();
+
+  // ui::EventHandler overrides:
+  void OnMouseEvent(ui::MouseEvent* event) override;
+  void OnGestureEvent(ui::GestureEvent* event) override;
+
+  // aura::client::FocusChangeObserver overrides:
+  void OnWindowFocused(aura::Window* gained_focus,
+                       aura::Window* lost_focus) override;
+
+  // aura::WindowObserver overrides:
+  void OnWindowBoundsChanged(aura::Window* root,
+                             const gfx::Rect& old_bounds,
+                             const gfx::Rect& new_bounds) override;
+
+  // ui::ImplicitAnimationObserver overrides:
+  void OnImplicitAnimationsCompleted() override;
+
+  // views::WidgetObserver overrides:
+  void OnWidgetDestroying(views::Widget* widget) override;
+
+  // KeyboardControllerObserver overrides:
+  void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) override;
+
+  // ShellObserver overrides:
+  void OnShelfAlignmentChanged(aura::Window* root_window) override;
+  void OnMaximizeModeStarted() override;
+  void OnMaximizeModeEnded() override;
+
+  // ShelfIconObserver overrides:
+  void OnShelfIconPositionsChanged() override;
+
+  // app_list::PaginationModelObserver overrides:
+  void TotalPagesChanged() override;
+  void SelectedPageChanged(int old_selected, int new_selected) override;
+  void TransitionStarted() override;
+  void TransitionChanged() override;
+
+  // Whether we should show or hide app list widget.
+  bool is_visible_;
+
+  // Whether the app list should remain centered.
+  bool is_centered_;
+
+  // The AppListView this class manages, owned by its widget.
+  app_list::AppListView* view_;
+
+  // The current page of the AppsGridView of |view_|. This is stored outside of
+  // the view's PaginationModel, so that it persists when the view is destroyed.
+  int current_apps_page_;
+
+  // Cached bounds of |view_| for snapping back animation after over-scroll.
+  gfx::Rect view_bounds_;
+
+  // Whether should schedule snap back animation.
+  bool should_snap_back_;
+
+  DISALLOW_COPY_AND_ASSIGN(AppListController);
+};
+
+}  // namespace ash
+
+#endif  // ASH_WM_APP_LIST_CONTROLLER_H_