Update MidiDispatcher to use Mojo Permission Service.

content/browser/web_contents/web_contents_impl.h

 // Copyright (c) 2012 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_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 37 matching lines @@
 namespace content {
 class BrowserPluginEmbedder;
 class BrowserPluginGuest;
 class BrowserPluginGuestManager;
 class DateTimeChooserAndroid;
 class DownloadItem;
 class GeolocationServiceContext;
 class InterstitialPageImpl;
 class JavaScriptDialogManager;
 class ManifestManagerHost;
-class MidiDispatcherHost;
 class PluginContentOriginWhitelist;
 class PowerSaveBlocker;
 class RenderViewHost;
 class RenderViewHostDelegateView;
 class RenderViewHostImpl;
 class RenderWidgetHostImpl;
 class SavePackage;
 class ScreenOrientationDispatcherHost;
 class SiteInstance;
 class TestWebContents;
@@ skipping 1137 matching lines @@
   bool is_subframe_;
 
   // Whether overscroll should be unconditionally disabled.
   bool force_disable_overscroll_content_;
 
   // Whether the last JavaScript dialog shown was suppressed. Used for testing.
   bool last_dialog_suppressed_;
 
   scoped_ptr<GeolocationServiceContext> geolocation_service_context_;
 
-  scoped_ptr<MidiDispatcherHost> midi_dispatcher_host_;
-
   scoped_ptr<ScreenOrientationDispatcherHost>
       screen_orientation_dispatcher_host_;
 
   scoped_ptr<ManifestManagerHost> manifest_manager_host_;
 
   // The accessibility mode for all frames. This is queried when each frame
   // is created, and broadcast to all frames when it changes.
   AccessibilityMode accessibility_mode_;
 
   // Monitors power levels for audio streams associated with this WebContents.
   AudioStreamMonitor audio_stream_monitor_;
 
   // Created on-demand to mute all audio output from this WebContents.
   scoped_ptr<WebContentsAudioMuter> audio_muter_;
 
   bool virtual_keyboard_requested_;
 
   base::WeakPtrFactory<WebContentsImpl> loading_weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_