Revert of Web MIDI: use mojom::blink::PermissionService directly to ask permission

content/renderer/render_frame_impl.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_RENDERER_RENDER_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 588 matching lines @@
   void requestStorageQuota(blink::WebStorageQuotaType type,
                            unsigned long long requested_size,
                            blink::WebStorageQuotaCallbacks callbacks) override;
   void willOpenWebSocket(blink::WebSocketHandle* handle) override;
   blink::WebPushClient* pushClient() override;
   blink::WebPresentationClient* presentationClient() override;
   void willStartUsingPeerConnectionHandler(
       blink::WebRTCPeerConnectionHandler* handler) override;
   blink::WebUserMediaClient* userMediaClient() override;
   blink::WebEncryptedMediaClient* encryptedMediaClient() override;
+  blink::WebMIDIClient* webMIDIClient() override;
   blink::WebString userAgentOverride() override;
   blink::WebString doNotTrackValue() override;
   bool allowWebGL(bool default_value) override;
   blink::WebScreenOrientationClient* webScreenOrientationClient() override;
   bool isControlledByServiceWorker(blink::WebDataSource& data_source) override;
   int64_t serviceWorkerID(blink::WebDataSource& data_source) override;
   void postAccessibilityEvent(const blink::WebAXObject& obj,
                               blink::WebAXEvent event) override;
   void handleAccessibilityFindInPageResult(
       int identifier,
@@ skipping 548 matching lines @@
       web_encrypted_media_client_;
 
   // The media permission dispatcher attached to this frame.
   std::unique_ptr<MediaPermissionDispatcher> media_permission_dispatcher_;
 
 #if defined(ENABLE_MOJO_MEDIA)
   // The media interface provider attached to this frame, lazily initialized.
   std::unique_ptr<MediaInterfaceProvider> media_interface_provider_;
 #endif
 
+  // MidiClient attached to this frame; lazily initialized.
+  MidiDispatcher* midi_dispatcher_;
+
 #if defined(OS_ANDROID)
   // Manages all media players and sessions in this render frame for
   // communicating with the real media player and sessions in the
   // browser process. It's okay to use raw pointers since they're both
   // RenderFrameObservers.
   RendererMediaPlayerManager* media_player_manager_;
   RendererMediaSessionManager* media_session_manager_;
 #endif
 
   media::SurfaceManager* media_surface_manager_;
@@ skipping 110 matching lines @@
   mojom::FrameHostPtr frame_host_;
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_