Clean up the PermissionInfoBarDelegate hierarchy.

chrome/browser/media/midi_permission_infobar_delegate_android.cc

 // 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.
 
 #include "chrome/browser/media/midi_permission_infobar_delegate_android.h"
 
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/infobars/core/infobar.h"
 #include "grit/theme_resources.h"
 
 // static
 infobars::InfoBar* MidiPermissionInfoBarDelegateAndroid::Create(
     InfoBarService* infobar_service,
     const GURL& requesting_frame,
     bool user_gesture,
     Profile* profile,
     const PermissionSetCallback& callback) {
   return infobar_service->AddInfoBar(
-      CreatePermissionInfoBar(std::unique_ptr<PermissionInfobarDelegate>(
+      CreatePermissionInfoBar(std::unique_ptr<PermissionInfoBarDelegate>(
           new MidiPermissionInfoBarDelegateAndroid(
               requesting_frame, user_gesture, profile, callback))));
 }
 
 MidiPermissionInfoBarDelegateAndroid::MidiPermissionInfoBarDelegateAndroid(
     const GURL& requesting_frame,
     bool user_gesture,
     Profile* profile,
     const PermissionSetCallback& callback)
-    : PermissionInfobarDelegate(requesting_frame,
-                                content::PermissionType::MIDI_SYSEX,
-                                CONTENT_SETTINGS_TYPE_MIDI_SYSEX,
-                                user_gesture,
-                                profile,
-                                callback),
-      requesting_frame_(requesting_frame) {}
+    : SinglePermissionInfoBarDelegate(requesting_frame,
+                                      content::PermissionType::MIDI_SYSEX,
+                                      CONTENT_SETTINGS_TYPE_MIDI_SYSEX,
+                                      user_gesture,
+                                      profile,
+                                      callback) {}
 
 MidiPermissionInfoBarDelegateAndroid::~MidiPermissionInfoBarDelegateAndroid() {}
 
 infobars::InfoBarDelegate::InfoBarIdentifier
 MidiPermissionInfoBarDelegateAndroid::GetIdentifier() const {
   return MIDI_PERMISSION_INFOBAR_DELEGATE_ANDROID;
 }
 
 int MidiPermissionInfoBarDelegateAndroid::GetIconId() const {
   return IDR_INFOBAR_MIDI;
 }
 
 int MidiPermissionInfoBarDelegateAndroid::GetMessageResourceId() const {
   return IDS_MIDI_SYSEX_INFOBAR_QUESTION;
 }