Make GetRootWindow() return a Window instead of a RootWindow.

ash/wm/overview/window_selector_item.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_ITEM_H_
 #define ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
 
 #include "base/compiler_specific.h"
 #include "ui/gfx/rect.h"
 
 namespace aura {
-class RootWindow;
 class Window;
 }
 
 namespace ash {
 
 // This class represents an item in overview mode. An item can have one or more
 // windows, of which only one can be activated by keyboard (i.e. alt+tab) but
 // any can be selected with a pointer (touch or mouse).
 class WindowSelectorItem {
  public:
   WindowSelectorItem();
   virtual ~WindowSelectorItem();
 
   // Returns the root window on which this item is shown.
-  virtual aura::RootWindow* GetRootWindow() = 0;
+  virtual aura::Window* GetRootWindow() = 0;
 
   // Returns the targeted window given the event |target| window.
   // Returns NULL if no Window in this item was selected.
   virtual aura::Window* TargetedWindow(const aura::Window* target) = 0;
 
   // Restores |window| on exiting window overview rather than returning it
   // to its previous state.
   virtual void RestoreWindowOnExit(aura::Window* window) = 0;
 
   // Returns the |window| to activate on selecting of this item.
   virtual aura::Window* SelectionWindow() = 0;
 
   // Removes |window| from this item. Check empty() after calling this to see
   // if the entire item is now empty.
   virtual void RemoveWindow(const aura::Window* window) = 0;
 
   // Returns true if this item has no more selectable windows (i.e. after
   // calling RemoveWindow for the last contained window).
   virtual bool empty() const = 0;
 
   // Dispatched before beginning window overview. This will do any necessary
   // one time actions such as restoring minimized windows.
   virtual void PrepareForOverview() = 0;
 
   // Sets the bounds of this window selector item to |target_bounds| in the
   // |root_window| root window.
-  void SetBounds(aura::RootWindow* root_window,
+  void SetBounds(aura::Window* root_window,
                  const gfx::Rect& target_bounds);
 
   // Recomputes the positions for the windows in this selection item. This is
   // dispatched when the bounds of a window change.
   void RecomputeWindowTransforms();
 
   const gfx::Rect& bounds() { return bounds_; }
   const gfx::Rect& target_bounds() { return target_bounds_; }
 
  protected:
   // Sets the bounds of this selector item to |target_bounds| in |root_window|.
   // If |animate| the windows are animated from their current location.
-  virtual void SetItemBounds(aura::RootWindow* root_window,
+  virtual void SetItemBounds(aura::Window* root_window,
                              const gfx::Rect& target_bounds,
                              bool animate) = 0;
 
   // Sets the bounds used by the selector item's windows.
   void set_bounds(const gfx::Rect& bounds) { bounds_ = bounds; }
 
  private:
   // The root window this item is being displayed on.
-  aura::RootWindow* root_window_;
+  aura::Window* root_window_;
 
   // The target bounds this selector item is fit within.
   gfx::Rect target_bounds_;
 
   // The actual bounds of the window(s) for this item. The aspect ratio of
   // window(s) are maintained so they may not fill the target_bounds_.
   gfx::Rect bounds_;
 
   // True if running SetItemBounds. This prevents recursive calls resulting from
   // the bounds update when calling views::corewm::RecreateWindowLayers to copy
   // a window layer for display on another monitor.
   bool in_bounds_update_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowSelectorItem);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_