Add a PermissionContext subclass for the midi permission

chrome/browser/media/midi_sysex_permission_context.h

-// Copyright 2013 The Chromium Authors. All rights reserved.
+// Copyright 2017 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_
+#ifndef CHROME_BROWSER_MEDIA_MIDI_SYSEX_PERMISSION_CONTEXT_H_
+#define CHROME_BROWSER_MEDIA_MIDI_SYSEX_PERMISSION_CONTEXT_H_
 
 #include "base/macros.h"
 #include "chrome/browser/permissions/permission_context_base.h"
 
 class GURL;
 class PermissionRequestID;
 
-class MidiPermissionContext : public PermissionContextBase {
+class MidiSysexPermissionContext : public PermissionContextBase {
  public:
-  explicit MidiPermissionContext(Profile* profile);
-  ~MidiPermissionContext() override;
+  explicit MidiSysexPermissionContext(Profile* profile);
+  ~MidiSysexPermissionContext() override;
 
  private:
   // PermissionContextBase:
   void UpdateTabContext(const PermissionRequestID& id,
                         const GURL& requesting_frame,
                         bool allowed) override;
   bool IsRestrictedToSecureOrigins() const override;
 
-  DISALLOW_COPY_AND_ASSIGN(MidiPermissionContext);
+  DISALLOW_COPY_AND_ASSIGN(MidiSysexPermissionContext);
 };
 
-#endif  // CHROME_BROWSER_MEDIA_MIDI_PERMISSION_CONTEXT_H_
+#endif  // CHROME_BROWSER_MEDIA_MIDI_SYSEX_PERMISSION_CONTEXT_H_