Stop using base::IDMap in the NotificationPermissionDispatcher

content/renderer/notification_permission_dispatcher.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 CONTENT_RENDERER_NOTIFICATION_PERMISSION_DISPATCHER_H_
 #define CONTENT_RENDERER_NOTIFICATION_PERMISSION_DISPATCHER_H_
 
-#include "base/id_map.h"
+#include "base/memory/scoped_ptr.h"
 #include "content/common/permission_service.mojom.h"
 #include "content/public/renderer/render_frame_observer.h"
 
 namespace blink {
 class WebNotificationPermissionCallback;
 class WebSecurityOrigin;
 }
 
 namespace content {
 
+class RenderFrame;
+
 // Dispatcher for Web Notification permission requests.
 class NotificationPermissionDispatcher : public RenderFrameObserver {
  public:
   explicit NotificationPermissionDispatcher(RenderFrame* render_frame);
   ~NotificationPermissionDispatcher() override;
 
   // Requests permission to display Web Notifications for |origin|. The callback
   // will be invoked when the permission status is available. This class will
   // take ownership of |callback|.
-  void RequestPermission(
-      const blink::WebSecurityOrigin& origin,
-      blink::WebNotificationPermissionCallback* callback);
+  void RequestPermission(const blink::WebSecurityOrigin& origin,
+                         blink::WebNotificationPermissionCallback* callback);
 
  private:
   void OnPermissionRequestComplete(
-      int request_id, PermissionStatus status);
-
-  // Tracks the active notification permission requests. This class takes
-  // ownership of the created WebNotificationPermissionCallback objects.
-  IDMap<blink::WebNotificationPermissionCallback, IDMapOwnPointer>
-      pending_requests_;
+      scoped_ptr<blink::WebNotificationPermissionCallback> callback,
+      PermissionStatus status);
 
   PermissionServicePtr permission_service_;
 
   DISALLOW_COPY_AND_ASSIGN(NotificationPermissionDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_NOTIFICATION_PERMISSION_DISPATCHER_H_