Add notifications to allow desktop notification permissions to be synced.

chrome/browser/notifications/desktop_notification_service.h

Index: chrome/browser/notifications/desktop_notification_service.h
diff --git a/chrome/browser/notifications/desktop_notification_service.h b/chrome/browser/notifications/desktop_notification_service.h
index 8be6f855c3c2d2f361e58ed44f8a0c15981140e3..c3a41f941c198cba5541059840d607358195b1f5 100644
--- a/chrome/browser/notifications/desktop_notification_service.h
+++ b/chrome/browser/notifications/desktop_notification_service.h
@@ -9,6 +9,7 @@
 
 #include "base/basictypes.h"
 #include "chrome/browser/notifications/notification.h"
+#include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_registrar.h"
 #include "chrome/common/notification_service.h"
 #include "googleurl/src/gurl.h"
@@ -21,7 +22,7 @@ class Task;
 
 // The DesktopNotificationService is an object, owned by the Profile,
 // which provides the creation of desktop "toasts" to web pages and workers.
-class DesktopNotificationService {
+class DesktopNotificationService : public NotificationObserver {
  public:
   enum DesktopNotificationSource {
     PageNotification,
@@ -69,6 +70,11 @@ class DesktopNotificationService {
   void GrantPermission(const GURL& origin);
   void DenyPermission(const GURL& origin);
 
+  // NotificationObserver implementation.
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
   NotificationsPrefsCache* prefs_cache() { return prefs_cache_; }
 
   // Creates a data:xxxx URL which contains the full HTML for a notification
@@ -78,6 +84,8 @@ class DesktopNotificationService {
                                 const string16& body);
  private:
   void InitPrefs();
+  void StartObserving();
+  void StopObserving();
 
   // Save a permission change to the profile.
   void PersistPermissionChange(const GURL& origin, bool is_allowed);