Remove --ash-disable-overview-mode

ash/wm/window_cycle_controller.h

-// 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_WINDOW_CYCLE_CONTROLLER_H_
-#define ASH_WM_WINDOW_CYCLE_CONTROLLER_H_
-
-#include "ash/ash_export.h"
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-
-namespace ui {
-class EventHandler;
-}
-
-namespace ash {
-
-class WindowCycleList;
-
-// Controls cycling through windows with the keyboard, for example, via alt-tab.
-// Windows are sorted primarily by most recently used, and then by screen order.
-// We activate windows as you cycle through them, so the order on the screen
-// may change during the gesture, but the most recently used list isn't updated
-// until the cycling ends.  Thus we maintain the state of the windows
-// at the beginning of the gesture so you can cycle through in a consistent
-// order.
-class ASH_EXPORT WindowCycleController {
- public:
-  enum Direction {
-    FORWARD,
-    BACKWARD
-  };
-  WindowCycleController();
-  virtual ~WindowCycleController();
-
-  // Returns true if cycling through windows is enabled. This is false at
-  // certain times, such as when the lock screen is visible.
-  static bool CanCycle();
-
-  // Cycles between windows in the given |direction|. If |is_alt_down| then
-  // interprets this call as the start of a multi-step cycle sequence and
-  // installs a key filter to watch for alt being released.
-  void HandleCycleWindow(Direction direction, bool is_alt_down);
-
-  // Cycles between windows without maintaining a multi-step cycle sequence
-  // (see above).
-  void HandleLinearCycleWindow();
-
-  // Informs the controller that the Alt key has been released and it can
-  // terminate the existing multi-step cycle.
-  void AltKeyReleased();
-
-  // Returns true if we are in the middle of a window cycling gesture.
-  bool IsCycling() const { return windows_.get() != NULL; }
-
-  // Returns the WindowCycleList. Really only useful for testing.
-  const WindowCycleList* windows() const { return windows_.get(); }
-
- private:
-  // Call to start cycling windows.  You must call StopCycling() when done.
-  void StartCycling();
-
-  // Cycles to the next or previous window based on |direction|.
-  void Step(Direction direction);
-
-  // Installs an event filter to watch for release of the alt key.
-  void InstallEventFilter();
-
-  // Stops the current window cycle and cleans up the event filter.
-  void StopCycling();
-
-  scoped_ptr<WindowCycleList> windows_;
-
-  // Event handler to watch for release of alt key.
-  scoped_ptr<ui::EventHandler> event_handler_;
-
-  DISALLOW_COPY_AND_ASSIGN(WindowCycleController);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_WINDOW_CYCLE_CONTROLLER_H_