Add a PermissionContext subclass for the midi permission

chrome/browser/media/midi_permission_context.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 CHROME_BROWSER_MEDIA_MIDI_PERMISSION_CONTEXT_H_
 #define CHROME_BROWSER_MEDIA_MIDI_PERMISSION_CONTEXT_H_
 
 #include "base/macros.h"
 #include "chrome/browser/permissions/permission_context_base.h"
 
-class GURL;
-class PermissionRequestID;
-
 class MidiPermissionContext : public PermissionContextBase {
  public:
   explicit MidiPermissionContext(Profile* profile);
   ~MidiPermissionContext() override;
 
  private:
   // PermissionContextBase:
-  void UpdateTabContext(const PermissionRequestID& id,
-                        const GURL& requesting_frame,
-                        bool allowed) override;
+  ContentSetting GetPermissionStatusInternal(
+      content::RenderFrameHost* render_frame_host,
+      const GURL& requesting_origin,
+      const GURL& embedding_origin) const override;
   bool IsRestrictedToSecureOrigins() const override;
 
   DISALLOW_COPY_AND_ASSIGN(MidiPermissionContext);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_MIDI_PERMISSION_CONTEXT_H_