Merge the code paths for closing different kinds of notifications.

third_party/WebKit/Source/modules/notifications/Notification.h

Index: third_party/WebKit/Source/modules/notifications/Notification.h
diff --git a/third_party/WebKit/Source/modules/notifications/Notification.h b/third_party/WebKit/Source/modules/notifications/Notification.h
index 8291bdaa1e6ca1f38cabd17c5bd3eb878d41b38c..50f37792ebdcecd0498bcac576a03cd8b50215c0 100644
--- a/third_party/WebKit/Source/modules/notifications/Notification.h
+++ b/third_party/WebKit/Source/modules/notifications/Notification.h
@@ -80,10 +80,10 @@ public:
     DEFINE_ATTRIBUTE_EVENT_LISTENER(close);
 
     // WebNotificationDelegate implementation.
-    void dispatchShowEvent() override;
-    void dispatchClickEvent() override;
+    void didShowNotification(const WebString& notificationId) override;
+    void didClickNotification() override;
+    void didCloseNotification() override;
     void dispatchErrorEvent() override;
-    void dispatchCloseEvent() override;
 
     String title() const;
     String dir() const;