Notifications: Add cross-platform UMA: ShowMessageCenter, ShowSettings.

chrome/browser/notifications/message_center_notification_manager.h

Index: chrome/browser/notifications/message_center_notification_manager.h
diff --git a/chrome/browser/notifications/message_center_notification_manager.h b/chrome/browser/notifications/message_center_notification_manager.h
index cb5dc79022b3e4b320534043645c5ee239fe6ce3..ccb14a8c3c5e908a75387a86212ae1cbdb8ceb9b 100644
--- a/chrome/browser/notifications/message_center_notification_manager.h
+++ b/chrome/browser/notifications/message_center_notification_manager.h
@@ -31,7 +31,6 @@ class Profile;
 // of notifications to MessageCenter, doing necessary conversions.
 class MessageCenterNotificationManager
     : public NotificationUIManagerImpl,
-      public message_center::MessageCenter::Delegate,
       public message_center::MessageCenterObserver {
  public:
   MessageCenterNotificationManager(
@@ -57,13 +56,10 @@ class MessageCenterNotificationManager
   virtual bool UpdateNotification(const Notification& notification,
                                   Profile* profile) OVERRIDE;
 
-  // MessageCenter::Delegate
-  virtual void ShowSettings(const std::string& notification_id) OVERRIDE;
-
   // MessageCenterObserver
   virtual void OnNotificationRemoved(const std::string& notification_id,
                                      bool by_user) OVERRIDE;
-  virtual void OnNotificationCenterClosed() OVERRIDE;
+  virtual void OnCenterVisibilityChanged(message_center::Visibility) OVERRIDE;
   virtual void OnNotificationUpdated(const std::string& notification_id)
       OVERRIDE;