Make //content responsible for generating notification Ids

content/public/browser/notification_event_dispatcher.h

Index: content/public/browser/notification_event_dispatcher.h
diff --git a/content/public/browser/notification_event_dispatcher.h b/content/public/browser/notification_event_dispatcher.h
index 9cc43d4017c8a5163b203d7439e73498529fe4aa..1c2289d3ffc9c5820d025eab48d41f69100a3730 100644
--- a/content/public/browser/notification_event_dispatcher.h
+++ b/content/public/browser/notification_event_dispatcher.h
@@ -5,7 +5,6 @@
 #ifndef CONTENT_PUBLIC_BROWSER_NOTIFICATION_EVENT_DISPATCHER_H_
 #define CONTENT_PUBLIC_BROWSER_NOTIFICATION_EVENT_DISPATCHER_H_
 
-#include <stdint.h>
 #include <string>
 
 #include "base/callback_forward.h"
@@ -17,7 +16,6 @@ class GURL;
 namespace content {
 
 class BrowserContext;
-struct PlatformNotificationData;
 
 // This is the dispatcher to be used for firing events related to persistent
 // notifications on a Service Worker. This class is a singleton, the instance of
@@ -31,23 +29,23 @@ class CONTENT_EXPORT NotificationEventDispatcher {
       base::Callback<void(PersistentNotificationStatus)>;
 
   // Dispatches the "notificationclick" event on the Service Worker associated
-  // with |persistent_notification_id| belonging to |origin|. The |callback|
-  // will be invoked when it's known whether the event successfully executed.
+  // with |notification_id| belonging to |origin|. The |callback| will be
+  // invoked when it's known whether the event successfully executed.
   virtual void DispatchNotificationClickEvent(
       BrowserContext* browser_context,
-      int64_t persistent_notification_id,
+      const std::string& notification_id,
       const GURL& origin,
       int action_index,
       const NotificationDispatchCompleteCallback&
           dispatch_complete_callback) = 0;
 
   // Dispatches the "notificationclose" event on the Service Worker associated
-  // with |persistent_notification_id| belonging to |origin|. The
+  // with |notification_id| belonging to |origin|. The
   // |dispatch_complete_callback| will be invoked when it's known whether the
   // event successfully executed.
   virtual void DispatchNotificationCloseEvent(
       BrowserContext* browser_context,
-      int64_t persistent_notification_id,
+      const std::string& notification_id,
       const GURL& origin,
       bool by_user,
       const NotificationDispatchCompleteCallback&