Moves common code in ash/wm/overview to ash/common/wm/overview

ash/wm/overview/window_selector_controller.h

-// Copyright 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_WM_OVERVIEW_WINDOW_SELECTOR_CONTROLLER_H_
-#define ASH_WM_OVERVIEW_WINDOW_SELECTOR_CONTROLLER_H_
-
-#include <list>
-#include <memory>
-#include <vector>
-
-#include "ash/ash_export.h"
-#include "ash/wm/overview/window_selector.h"
-#include "ash/wm/overview/window_selector_delegate.h"
-#include "base/macros.h"
-#include "base/time/time.h"
-
-namespace ash {
-class WindowSelector;
-class WindowSelectorTest;
-
-// Manages a window selector which displays an overview of all windows and
-// allows selecting a window to activate it.
-class ASH_EXPORT WindowSelectorController
-    : public WindowSelectorDelegate {
- public:
-  WindowSelectorController();
-  ~WindowSelectorController() override;
-
-  // Returns true if selecting windows in an overview is enabled. This is false
-  // at certain times, such as when the lock screen is visible.
-  static bool CanSelect();
-
-  // Enters overview mode. This is essentially the window cycling mode however
-  // not released on releasing the alt key and allows selecting with the mouse
-  // or touch rather than keypresses.
-  void ToggleOverview();
-
-  // Returns true if window selection mode is active.
-  bool IsSelecting();
-
-  // Returns true if overview mode is restoring minimized windows so that they
-  // are visible during overview mode.
-  bool IsRestoringMinimizedWindows() const;
-
-  // WindowSelectorDelegate:
-  void OnSelectionEnded() override;
-
- private:
-  friend class WindowSelectorTest;
-
-  // Dispatched when window selection begins.
-  void OnSelectionStarted();
-
-  std::unique_ptr<WindowSelector> window_selector_;
-  base::Time last_selection_time_;
-
-  DISALLOW_COPY_AND_ASSIGN(WindowSelectorController);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_OVERVIEW_WINDOW_SELECTOR_CONTROLLER_H_