Make //content responsible for generating notification Ids

third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h

Index: third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h
diff --git a/third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h b/third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h
index 2f815b3b6f3f671e3be3cebce74d6f6c6483a5b3..f5a0cc904ced876585ad8f392416c8c2b604815b 100644
--- a/third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h
+++ b/third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h
@@ -21,7 +21,7 @@ class WebServiceWorkerRegistration;
 
 // Structure representing the info associated with a persistent notification.
 struct WebPersistentNotificationInfo {
-    int64_t persistentId = 0;
+    WebString notificationId;
     WebNotificationData data;
 };
 
@@ -50,8 +50,8 @@ public:
     // Closes a notification previously shown, and removes it if being shown.
     virtual void close(WebNotificationDelegate*) = 0;
 
-    // Closes a persistent notification identified by its persistent notification Id.
-    virtual void closePersistent(const WebSecurityOrigin&, int64_t persistentNotificationId) = 0;
+    // Closes a persistent notification identified by its notification Id.
+    virtual void closePersistent(const WebSecurityOrigin&, const WebString& tag, const WebString& notificationId) = 0;
 
     // Indicates that the delegate object is being destroyed, and must no longer
     // be used by the embedder to dispatch events.