Start delegating notifications to MessageCenter on Windows.

chrome/test/base/testing_browser_process.h

Index: chrome/test/base/testing_browser_process.h
diff --git a/chrome/test/base/testing_browser_process.h b/chrome/test/base/testing_browser_process.h
index 40409d35e6ab882700a2411f664e80bb81b9f1cf..4c80d12d4c51a1cd1c60ce2df8f53a18dc6eae20 100644
--- a/chrome/test/base/testing_browser_process.h
+++ b/chrome/test/base/testing_browser_process.h
@@ -73,6 +73,7 @@ class TestingBrowserProcess : public BrowserProcess {
   virtual extensions::EventRouterForwarder*
       extension_event_router_forwarder() OVERRIDE;
   virtual NotificationUIManager* notification_ui_manager() OVERRIDE;
+  virtual message_center::MessageCenter* message_center() OVERRIDE;
   virtual IntranetRedirectDetector* intranet_redirect_detector() OVERRIDE;
   virtual AutomationProviderList* GetAutomationProviderList() OVERRIDE;
   virtual void CreateDevToolsHttpProtocolHandler(
@@ -131,6 +132,9 @@ class TestingBrowserProcess : public BrowserProcess {
 #endif
   scoped_ptr<ProfileManager> profile_manager_;
   scoped_ptr<NotificationUIManager> notification_ui_manager_;
+#if defined(ENABLE_MESSAGE_CENTER)
+  scoped_ptr<message_center::MessageCenter> message_center_;
+#endif
   scoped_ptr<printing::BackgroundPrintingManager> background_printing_manager_;
   scoped_refptr<printing::PrintPreviewDialogController>
       print_preview_dialog_controller_;