The 1st patch to disambiguate message center notifications

chrome/browser/notifications/extension_welcome_notification.cc

Index: chrome/browser/notifications/extension_welcome_notification.cc
diff --git a/chrome/browser/notifications/extension_welcome_notification.cc b/chrome/browser/notifications/extension_welcome_notification.cc
index 50a5a09080bae3fb4abe145951696d778b03e148..cbe7e79beca2da3de0b40b0ebd4bb0278be4274d 100644
--- a/chrome/browser/notifications/extension_welcome_notification.cc
+++ b/chrome/browser/notifications/extension_welcome_notification.cc
@@ -289,7 +289,8 @@ void ExtensionWelcomeNotification::ShowWelcomeNotification(
 
 void ExtensionWelcomeNotification::HideWelcomeNotification() {
   if (!welcome_notification_id_.empty() &&
-      GetMessageCenter()->HasNotification(welcome_notification_id_)) {
+      GetMessageCenter()->FindVisibleNotificationById(
+          welcome_notification_id_) != NULL) {
     GetMessageCenter()->RemoveNotification(welcome_notification_id_, false);
     StopExpirationTimer();
   }