Make //content responsible for generating notification Ids

chrome/browser/notifications/persistent_notification_delegate.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 CHROME_BROWSER_NOTIFICATIONS_PERSISTENT_NOTIFICATION_DELEGATE_H_
 #define CHROME_BROWSER_NOTIFICATIONS_PERSISTENT_NOTIFICATION_DELEGATE_H_
 
-#include <stdint.h>
 #include <string>
 
 #include "base/macros.h"
 #include "chrome/browser/notifications/notification_delegate.h"
 #include "url/gurl.h"
 
 namespace content {
 class BrowserContext;
 }
 
 // Delegate responsible for listening to the click event on persistent
 // notifications, to forward them to the PlatformNotificationService so that
 // JavaScript events can be fired on the associated Service Worker.
 class PersistentNotificationDelegate : public NotificationDelegate {
  public:
   PersistentNotificationDelegate(content::BrowserContext* browser_context,
-                                 int64_t persistent_notification_id,
+                                 const std::string& notification_id,
                                  const GURL& origin,
                                  int notification_settings_index);
 
-  // Persistent id of this notification in the notification database. To be
-  // used when retrieving all information associated with it.
-  int64_t persistent_notification_id() const {
-    return persistent_notification_id_;
-  }
-
   // NotificationDelegate implementation.
   void Display() override;
   void Close(bool by_user) override;
   void Click() override;
   void ButtonClick(int button_index) override;
   void SettingsClick() override;
   bool ShouldDisplaySettingsButton() override;
 
   std::string id() const override;
 
  protected:
   ~PersistentNotificationDelegate() override;
 
  private:
   content::BrowserContext* browser_context_;
-  int64_t persistent_notification_id_;
+  std::string notification_id_;
   GURL origin_;
-  std::string id_;
   int notification_settings_index_;
 
   DISALLOW_COPY_AND_ASSIGN(PersistentNotificationDelegate);
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_PERSISTENT_NOTIFICATION_DELEGATE_H_