Update the Notification Blink API to use integral persistent ids.

public/platform/modules/notifications/WebNotificationManager.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebNotificationManager_h
 #define WebNotificationManager_h
 
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/WebCommon.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebVector.h"
 #include "public/platform/modules/notifications/WebNotificationData.h"
 #include "public/platform/modules/notifications/WebNotificationPermission.h"
+#include <stdint.h>
 
 namespace blink {
 
 class WebNotificationDelegate;
 class WebSerializedOrigin;
 class WebServiceWorkerRegistration;
 
 // Structure representing the info associated with a persistent notification.
 struct WebPersistentNotificationInfo {
+    // TODO(peter): Remove the string property when Chromium has switched over.
     WebString persistentNotificationId;
+
+    int64_t persistentId = 0;
     WebNotificationData data;
 };
 
 using WebNotificationGetCallbacks = WebCallbacks<WebVector<WebPersistentNotificationInfo>, void>;
 using WebNotificationShowCallbacks = WebCallbacks<void, void>;
 
 // Provides the services to show platform notifications to the user.
 class WebNotificationManager {
 public:
     virtual ~WebNotificationManager() { }
 
     // Shows a page notification on the user's system. These notifications will have their
     // events delivered to the delegate specified in this call.
     virtual void show(const WebSerializedOrigin&, const WebNotificationData&, WebNotificationDelegate*) = 0;
 
     // Shows a persistent notification on the user's system. These notifications will have
     // their events delivered to a Service Worker rather than the object's delegate. Will
     // take ownership of the WebNotificationShowCallbacks object.
     virtual void showPersistent(const WebSerializedOrigin&, const WebNotificationData&, WebServiceWorkerRegistration*, WebNotificationShowCallbacks*) = 0;
 
     // Asynchronously gets the persistent notifications belonging to the Service Worker Registration.
     // If |filterTag| is not an empty string, only the notification with the given tag will be
     // considered. Will take ownership of the WebNotificationGetCallbacks object.
-    virtual void getNotifications(const WebString& filterTag, WebServiceWorkerRegistration*, WebNotificationGetCallbacks*)
-    {
-        BLINK_ASSERT_NOT_REACHED();
-    }
+    virtual void getNotifications(const WebString& filterTag, WebServiceWorkerRegistration*, WebNotificationGetCallbacks*) = 0;
 
     // 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 WebSerializedOrigin&, const WebString& persistentNotificationId) = 0;
+    virtual void closePersistent(const WebSerializedOrigin&, int64_t persistentNotificationId)
+    {
+        BLINK_ASSERT_NOT_REACHED();
+    }
+
+    // TODO(peter): Remove this method when the embedder accepts integral persistent ids.
+    virtual void closePersistent(const WebSerializedOrigin&, const WebString& persistentNotificationId)
+    {
+        BLINK_ASSERT_NOT_REACHED();
+    }
 
     // Indicates that the delegate object is being destroyed, and must no longer
     // be used by the embedder to dispatch events.
     virtual void notifyDelegateDestroyed(WebNotificationDelegate*) = 0;
 
     // Synchronously checks the permission level for the given origin.
     virtual WebNotificationPermission checkPermission(const WebSerializedOrigin&) = 0;
 };
 
 } // namespace blink
 
 #endif // WebNotificationManager_h