Start delegating notifications to MessageCenter on Windows.

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_
 
 #include <utility>
 #include <vector>
 
@@ skipping 45 matching lines @@
 class Widget;
 namespace corewm {
 class CompoundEventFilter;
 class InputMethodEventFilter;
 class ShadowController;
 class VisibilityController;
 class WindowModalityController;
 }
 }
 
+namespace message_center {
+class MessageCenter;
+}
+
 namespace ash {
 
 class AcceleratorController;
 class CapsLockDelegate;
 class DesktopBackgroundController;
 class DisplayController;
 class HighContrastController;
 class Launcher;
 class LauncherDelegate;
 class LauncherModel;
@@ skipping 348 matching lines @@
 
 #if defined(OS_CHROMEOS)
   chromeos::OutputConfigurator* output_configurator() {
     return output_configurator_.get();
   }
   internal::OutputConfiguratorAnimation* output_configurator_animation() {
     return output_configurator_animation_.get();
   }
 #endif  // defined(OS_CHROMEOS)
 
- RootWindowHostFactory* root_window_host_factory() {
-   return root_window_host_factory_.get();
- }
+  RootWindowHostFactory* root_window_host_factory() {
+    return root_window_host_factory_.get();
+  }
+
+  // MessageCenter is a global list of currently displayed notifications.
+  message_center::MessageCenter* message_center();
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ExtendedDesktopTest, TestCursor);
   FRIEND_TEST_ALL_PREFIXES(WindowManagerTest, MouseEventCursors);
   FRIEND_TEST_ALL_PREFIXES(WindowManagerTest, TransformActivate);
   friend class internal::RootWindowController;
   friend class test::ShellTestApi;
   friend class shell::WindowWatcher;
 
   typedef std::pair<aura::Window*, gfx::Rect> WindowAndBoundsPair;
@@ skipping 122 matching lines @@
 #if defined(OS_CHROMEOS)
   // Controls video output device state.
   scoped_ptr<chromeos::OutputConfigurator> output_configurator_;
   scoped_ptr<internal::OutputConfiguratorAnimation>
       output_configurator_animation_;
 
   // Receives output change events and udpates the display manager.
   scoped_ptr<internal::DisplayChangeObserverX11> display_change_observer_;
 #endif  // defined(OS_CHROMEOS)
 
+  scoped_ptr<message_center::MessageCenter> message_center_;
+
   CursorManager cursor_manager_;
 
   ObserverList<ShellObserver> observers_;
 
   // Used by ash/shell.
   content::BrowserContext* browser_context_;
 
   // For testing only: simulate that a modal window is open
   bool simulate_modal_window_open_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_