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

ash/wm/base_layout_manager.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_BASE_LAYOUT_MANAGER_H_
 #define ASH_WM_BASE_LAYOUT_MANAGER_H_
 
 #include <set>
 
 #include "ash/ash_export.h"
 #include "ash/shell_observer.h"
 #include "ash/wm/window_state_observer.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/aura/client/activation_change_observer.h"
 #include "ui/aura/layout_manager.h"
 #include "ui/aura/window_observer.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/events/event_handler.h"
 
 namespace aura {
-class RootWindow;
 class Window;
 }
 
 namespace ash {
 namespace wm {
 class WindowState;
 }
 
 namespace internal {
 
 // BaseLayoutManager is the simplest possible implementation for a window
 // layout manager. It listens for changes to kShowStateKey and resizes the
 // window appropriately.  Subclasses should be sure to invoke the base class
 // for adding and removing windows, otherwise show state will not be tracked
 // properly.
 class ASH_EXPORT BaseLayoutManager
     : public aura::LayoutManager,
       public aura::WindowObserver,
       public aura::client::ActivationChangeObserver,
       public ShellObserver,
       public wm::WindowStateObserver {
  public:
   typedef std::set<aura::Window*> WindowSet;
 
-  explicit BaseLayoutManager(aura::RootWindow* root_window);
+  explicit BaseLayoutManager(aura::Window* root_window);
   virtual ~BaseLayoutManager();
 
   const WindowSet& windows() const { return windows_; }
 
   // Given a |window| and tentative |restore_bounds|, returns new bounds that
   // ensure that at least a few pixels of the screen background are visible
   // outside the edges of the window.
   static gfx::Rect BoundsWithScreenEdgeVisible(aura::Window* window,
                                                const gfx::Rect& restore_bounds);
 
@@ skipping 44 matching lines @@
   // is on display.
   virtual void AdjustAllWindowsBoundsForWorkAreaChange(
       AdjustWindowReason reason);
 
   // Adjusts the sizes of the specific window in respond to a screen change or
   // display-area size change.
   virtual void AdjustWindowBoundsForWorkAreaChange(
       wm::WindowState* window_state,
       AdjustWindowReason reason);
 
-  aura::RootWindow* root_window() { return root_window_; }
+  aura::Window* root_window() { return root_window_; }
 
  private:
   // Update window bounds based on a change in show state.
   void UpdateBoundsFromShowState(wm::WindowState* controller);
 
   // Set of windows we're listening to.
   WindowSet windows_;
 
-  aura::RootWindow* root_window_;
+  aura::Window* root_window_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseLayoutManager);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_BASE_LAYOUT_MANAGER_H_