Update the Notification Blink API to use integral persistent ids.

Source/modules/notifications/Notification.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 46 matching lines @@
 class Notification final : public RefCountedGarbageCollectedEventTargetWithInlineData<Notification>, public ActiveDOMObject, public WebNotificationDelegate {
     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<Notification>);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(Notification);
     DEFINE_WRAPPERTYPEINFO();
 public:
     // Used for JavaScript instantiations of the Notification object. Will automatically schedule for
     // the notification to be displayed to the user.
     static Notification* create(ExecutionContext*, const String& title, const NotificationOptions&, ExceptionState&);
 
     // Used for embedder-created Notification objects. Will initialize the Notification's state as showing.
+    static Notification* create(ExecutionContext*, int64_t persistentId, const WebNotificationData&);
+    // TODO(peter): Remove this method when the embedder only passes us int64_t persistent notification ids.
     static Notification* create(ExecutionContext*, const String& persistentId, const WebNotificationData&);
 
     virtual ~Notification();
 
     void close();
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(click);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(show);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(close);
@@ skipping 46 matching lines @@
     void show();
 
     void setDir(const String& dir) { m_dir = dir; }
     void setLang(const String& lang) { m_lang = lang; }
     void setBody(const String& body) { m_body = body; }
     void setIconUrl(KURL iconUrl) { m_iconUrl = iconUrl; }
     void setTag(const String& tag) { m_tag = tag; }
     void setSilent(bool silent) { m_silent = silent; }
     void setSerializedData(PassRefPtr<SerializedScriptValue> data) { m_serializedData = data; }
 
-    void setPersistentId(const String& persistentId) { m_persistentId = persistentId; }
+    void setPersistentId(int64_t persistentId) { m_persistentId = persistentId; }
+    void setPersistentIdString(const String& persistentId) { m_persistentIdString = persistentId; }
 
 private:
     String m_title;
     String m_dir;
     String m_lang;
     String m_body;
     String m_tag;
     bool m_silent;
     RefPtr<SerializedScriptValue> m_serializedData;
 
     KURL m_iconUrl;
 
     // Notifications can either be bound to the page, which means they're identified by
     // their delegate, or persistent, which means they're identified by a persistent Id
     // given to us by the embedder. This influences how we close the notification.
-    String m_persistentId;
+    int64_t m_persistentId;
+    String m_persistentIdString;
 
     enum NotificationState {
         NotificationStateIdle,
         NotificationStateShowing,
         NotificationStateClosing,
         NotificationStateClosed
     };
 
     // Only to be used by the Notification::create() method when notifications were created
     // by the embedder rather than by Blink.
     void setState(NotificationState state) { m_state = state; }
 
     NotificationState m_state;
 
     AsyncMethodRunner<Notification> m_asyncRunner;
 };
 
 } // namespace blink
 
 #endif // Notification_h