Add functionality to the Windows 8 notification display functionality to invoke a caller specified …

win8/metro_driver/toast_notification_handler.h

Index: win8/metro_driver/toast_notification_handler.h
===================================================================
--- win8/metro_driver/toast_notification_handler.h	(revision 160886)
+++ win8/metro_driver/toast_notification_handler.h	(working copy)
@@ -8,6 +8,7 @@
 #include <windows.ui.notifications.h>
 
 #include "base/string16.h"
+#include "base/win/metro.h"
 
 // Provides functionality to display a metro style toast notification.
 class ToastNotificationHandler {
@@ -20,13 +21,19 @@
     string16 body;
     string16 display_source;
     std::string id;
+    base::win::MetroNotificationClickedHandler notification_handler;
+    string16 notification_context;
 
     DesktopNotification(const char* notification_origin,
                         const char* notification_icon,
                         const wchar_t* notification_title,
                         const wchar_t* notification_body,
                         const wchar_t* notification_display_source,
-                        const char* notification_id);
+                        const char* notification_id,
+                        base::win::MetroNotificationClickedHandler handler,
+                        const wchar_t* handler_context);
+
+    DesktopNotification();
   };
 
   ToastNotificationHandler();
@@ -41,8 +48,8 @@
  private:
   mswr::ComPtr<winui::Notifications::IToastNotifier> notifier_;
   mswr::ComPtr<winui::Notifications::IToastNotification> notification_;
-
   EventRegistrationToken activated_token_;
+  DesktopNotification notification_info_;
 };
 
 #endif  // CHROME_BROWSER_UI_METRO_DRIVER_TOAST_NOTIFICATION_HANDLER_H_