Convert MIDI permission requests to use WebContents in preparation for switching the code to using …

content/browser/renderer_host/media/midi_dispatcher_host.h

-// Copyright 2013 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_BROWSER_RENDERER_HOST_MEDIA_MIDI_DISPATCHER_HOST_H_
-#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MIDI_DISPATCHER_HOST_H_
-
-#include "content/public/browser/browser_message_filter.h"
-
-class GURL;
-
-namespace content {
-
-class BrowserContext;
-
-// MidiDispatcherHost handles permissions for using system exclusive messages.
-// It works as BrowserMessageFilter to handle IPC messages between
-// MidiDispatcher running as a RenderViewObserver.
-class MidiDispatcherHost : public BrowserMessageFilter {
- public:
-  MidiDispatcherHost(int render_process_id, BrowserContext* browser_context);
-
-  // BrowserMessageFilter implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
-  virtual void OverrideThreadForMessage(
-      const IPC::Message& message, BrowserThread::ID* thread) OVERRIDE;
-
- protected:
-  virtual ~MidiDispatcherHost();
-
- private:
-  void OnRequestSysExPermission(int render_view_id,
-                                int bridge_id,
-                                const GURL& origin,
-                                bool user_gesture);
-  void OnCancelSysExPermissionRequest(int render_view_id,
-                                      int bridge_id,
-                                      const GURL& requesting_frame);
-  void WasSysExPermissionGranted(int render_view_id,
-                                 int bridge_id,
-                                 bool is_allowed);
-
-  int render_process_id_;
-  BrowserContext* browser_context_;
-
-  DISALLOW_COPY_AND_ASSIGN(MidiDispatcherHost);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MIDI_DISPATCHER_HOST_H_