Eliminate Shell::RootWindowList in favor of aura::Window::Windows.

ash/magnifier/partial_magnification_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_MAGNIFIER_PARTIAL_MAGNIFICATION_CONTROLLER_H_
 #define ASH_MAGNIFIER_PARTIAL_MAGNIFICATION_CONTROLLER_H_
 
 #include "ui/aura/window_observer.h"
 #include "ui/events/event_handler.h"
 #include "ui/gfx/point.h"
 #include "ui/views/widget/widget_observer.h"
 
-namespace aura {
-class RootWindow;
-}
-
 namespace ash {
 
 const float kDefaultPartialMagnifiedScale = 1.5f;
 const float kNonPartialMagnifiedScale = 1.0f;
 
 // Controls the partial screen magnifier, which is a small area of the screen
 // which is zoomed in.  The zoomed area follows the mouse cursor when enabled.
 class PartialMagnificationController
   : public ui::EventHandler,
     public aura::WindowObserver,
@@ skipping 18 matching lines @@
   void OnMouseMove(const gfx::Point& location_in_root);
 
   // Switch PartialMagnified RootWindow to |new_root_window|. This does
   // following:
   //  - Remove the magnifier from the current root window.
   //  - Create a magnifier in the new root_window |new_root_window|.
   //  - Switch the target window from current window to |new_root_window|.
   void SwitchTargetRootWindow(aura::Window* new_root_window);
 
   // Returns the root window that contains the mouse cursor.
-  aura::RootWindow* GetCurrentRootWindow();
+  aura::Window* GetCurrentRootWindow();
 
   // Return true if the magnification scale > kMinPartialMagnifiedScaleThreshold
   bool IsPartialMagnified() const;
 
   // Create the magnifier window.
   void CreateMagnifierWindow();
 
   // Cleans up the window if needed.
   void CloseMagnifierWindow();
 
@@ skipping 20 matching lines @@
   gfx::Point origin_;
 
   views::Widget* zoom_widget_;
 
   DISALLOW_COPY_AND_ASSIGN(PartialMagnificationController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_MAGNIFIER_PARTIAL_MAGNIFICATION_CONTROLLER_H_