Relocate and refactor overview mode files.

ash/wm/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_WINDOW_SELECTOR_CONTROLLER_H_
-#define ASH_WM_WINDOW_SELECTOR_CONTROLLER_H_
-
-#include <list>
-#include <vector>
-
-#include "ash/ash_export.h"
-#include "ash/wm/window_selector.h"
-#include "ash/wm/window_selector_delegate.h"
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/aura/window_observer.h"
-
-namespace aura {
-class Window;
-}
-
-namespace ui {
-class EventHandler;
-}
-
-namespace ash {
-
-class WindowSelector;
-
-// 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();
-  virtual ~WindowSelectorController();
-
-  // 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();
-
-  // Cycles between windows in the given |direction|. It is assumed that the
-  // alt key is held down and a key filter is installed to watch for alt being
-  // released.
-  void HandleCycleWindow(WindowSelector::Direction direction);
-
-  // Informs the controller that the Alt key has been released and it can
-  // terminate the existing multi-step cycle.
-  void AltKeyReleased();
-
-  // Returns true if window selection mode is active.
-  bool IsSelecting();
-
-  // WindowSelectorDelegate:
-  virtual void OnWindowSelected(aura::Window* window) OVERRIDE;
-  virtual void OnSelectionCanceled() OVERRIDE;
-
- private:
-  scoped_ptr<WindowSelector> window_selector_;
-  scoped_ptr<ui::EventHandler> event_handler_;
-
-  DISALLOW_COPY_AND_ASSIGN(WindowSelectorController);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_WINDOW_SELECTOR_CONTROLLER_H_