Use Mojo Permission Service when requesting Notifications permission.

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 "content/common/permission_service.mojom.h"
 #include "content/public/renderer/render_frame_observer.h"
-#include "ipc/ipc_message.h"
-#include "third_party/WebKit/public/platform/WebNotificationPermission.h"
 
 namespace blink {
 class WebNotificationPermissionCallback;
 class WebSecurityOrigin;
 }
 
 namespace content {
 
 // Dispatcher for Web Notification permission requests.
 class NotificationPermissionDispatcher : public RenderFrameObserver {

[nasko, 2014/11/25 00:44:58]

Does this still need to be RenderFrameObserver?

[nasko, 2014/11/25 00:48:03]

Nevermind, I answered my own question. It is still one per frame, so it indeed
must remain RFO, but doesn't override any of the methods.

  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);
 
  private:
-  // RenderFrameObserver implementation.
-  bool OnMessageReceived(const IPC::Message& message) override;
-
   void OnPermissionRequestComplete(
-      int request_id, blink::WebNotificationPermission result);
+      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_;
 
+  PermissionServicePtr permission_service_;
+
   DISALLOW_COPY_AND_ASSIGN(NotificationPermissionDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_NOTIFICATION_PERMISSION_DISPATCHER_H_