ash: Resize PowerButtonController background layer.

ash/wm/power_button_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_POWER_BUTTON_CONTROLLER_H_
 #define ASH_WM_POWER_BUTTON_CONTROLLER_H_
 #pragma once
 
 #include "ash/ash_export.h"
 #include "ash/shell_observer.h"
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "ui/aura/root_window_observer.h"
 
 namespace gfx {
+class Rect;
 class Size;
 }
 
 namespace ui {
 class Layer;
 }
 
 namespace ash {
 
 // Performs system-related functions on behalf of PowerButtonController.
@@ skipping 85 matching lines @@
     }
 
     // Returns true if the given set of containers was last animated with
     // |type| (probably; the analysis is fairly ad-hoc).
     bool ContainerGroupIsAnimated(ContainerGroup group,
                                   AnimationType type) const;
 
     // Returns true if |background_layer_| is non-NULL and visible.
     bool BackgroundLayerIsVisible() const;
 
+    // Returns |background_layer_|'s bounds, or an empty rect if the layer is
+    // NULL.
+    gfx::Rect GetBackgroundLayerBounds() const;
+
    private:
     PowerButtonController* controller_;  // not owned
 
     DISALLOW_COPY_AND_ASSIGN(TestApi);
   };
 
   PowerButtonController();
   virtual ~PowerButtonController();
 
   void set_delegate(PowerButtonControllerDelegate* delegate) {
@@ skipping 110 matching lines @@
   // |background_layer_|, as the desktop background is now covering the whole
   // screen.
   base::OneShotTimer<PowerButtonController> hide_background_layer_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_POWER_BUTTON_CONTROLLER_H_