Clean up the PermissionInfoBarDelegate hierarchy.

chrome/browser/media/midi_permission_infobar_delegate_android.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_INFOBAR_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_MEDIA_MIDI_PERMISSION_INFOBAR_DELEGATE_ANDROID_H_
 
 #include <string>
 
 #include "base/macros.h"
-#include "chrome/browser/permissions/permission_infobar_delegate.h"
-#include "components/content_settings/core/common/content_settings_types.h"
+#include "chrome/browser/permissions/single_permission_infobar_delegate.h"
 
 class GURL;
 class InfoBarService;
 
 // MidiPermissionInfoBarDelegateAndroids are created by the
 // MidiPermissionContext to control the display and handling of MIDI permission
 // infobars to the user.
-class MidiPermissionInfoBarDelegateAndroid : public PermissionInfobarDelegate {
+class MidiPermissionInfoBarDelegateAndroid
+    : public SinglePermissionInfoBarDelegate {
  public:
   // Creates a MIDI permission infobar and delegate and adds the infobar to
   // |infobar_service|.  Returns the infobar if it was successfully added.
   static infobars::InfoBar* Create(InfoBarService* infobar_service,
                                    const GURL& requesting_frame,
                                    bool user_gesture,
                                    Profile* profile,
                                    const PermissionSetCallback& callback);
 
  private:
   MidiPermissionInfoBarDelegateAndroid(const GURL& requesting_frame,
                                        bool user_gesture,
                                        Profile* profile,
                                        const PermissionSetCallback& callback);
   ~MidiPermissionInfoBarDelegateAndroid() override;
 
   // ConfirmInfoBarDelegate:
   infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
   int GetIconId() const override;
   int GetMessageResourceId() const override;
 
-  GURL requesting_frame_;
-
   DISALLOW_COPY_AND_ASSIGN(MidiPermissionInfoBarDelegateAndroid);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_MIDI_PERMISSION_INFOBAR_DELEGATE_ANDROID_H_