chromeos: Add support for dimming the screen.

ash/shell.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_SHELL_H_
 #define ASH_SHELL_H_
 #pragma once
 
 #include <utility>
 #include <vector>
@@ skipping 59 matching lines @@
 class FocusCycler;
 class InputMethodEventFilter;
 class KeyRewriterEventFilter;
 class MagnificationController;
 class MonitorController;
 class PanelLayoutManager;
 class PartialScreenshotEventFilter;
 class ResizeShadowController;
 class RootWindowEventFilter;
 class RootWindowLayoutManager;
+class ScreenDimmer;
 class ShadowController;
 class ShelfLayoutManager;
 class ShellContextMenu;
 class SystemGestureEventFilter;
 class StackingController;
 class TooltipController;
 class VisibilityController;
 class WindowModalityController;
 class WorkspaceController;
 }
@@ skipping 139 matching lines @@
 
   ShellDelegate* delegate() { return delegate_.get(); }
   SystemTrayDelegate* tray_delegate() { return tray_delegate_.get(); }
   UserWallpaperDelegate* user_wallpaper_delegate() {
     return user_wallpaper_delegate_.get();
   }
 
   internal::MagnificationController* magnification_controller() {
     return magnification_controller_.get();
   }
+  internal::ScreenDimmer* screen_dimmer() {
+    return screen_dimmer_.get();
+  }
 
   Launcher* launcher() { return launcher_.get(); }
 
   const ScreenAsh* screen() { return screen_; }
 
   // Force the shelf to query for it's current visibility state.
   void UpdateShelfVisibility();
 
   // Sets/gets the shelf auto-hide behavior.
   void SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior);
@@ skipping 83 matching lines @@
   scoped_ptr<internal::TooltipController> tooltip_controller_;
   scoped_ptr<internal::VisibilityController> visibility_controller_;
   scoped_ptr<DesktopBackgroundController> desktop_background_controller_;
   scoped_ptr<PowerButtonController> power_button_controller_;
   scoped_ptr<VideoDetector> video_detector_;
   scoped_ptr<WindowCycleController> window_cycle_controller_;
   scoped_ptr<internal::FocusCycler> focus_cycler_;
   scoped_ptr<internal::EventClientImpl> event_client_;
   scoped_ptr<internal::MonitorController> monitor_controller_;
   scoped_ptr<internal::MagnificationController> magnification_controller_;
+  scoped_ptr<internal::ScreenDimmer> screen_dimmer_;
 
   // An event filter that rewrites or drops a key event.
   scoped_ptr<internal::KeyRewriterEventFilter> key_rewriter_filter_;
 
   // An event filter that pre-handles key events while the partial
   // screenshot UI is active.
   scoped_ptr<internal::PartialScreenshotEventFilter> partial_screenshot_filter_;
 
   // An event filter which handles system level gestures
   scoped_ptr<internal::SystemGestureEventFilter> system_gesture_filter_;
@@ skipping 24 matching lines @@
 
   // Used by ash/shell.
   content::BrowserContext* browser_context_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_