Add method for identifying different InfoBars

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 "components/url_formatter/elide_url.h"
@@ skipping 18 matching lines @@
     const PermissionSetCallback& callback)
     : PermissionInfobarDelegate(requesting_frame,
                                 content::PermissionType::MIDI_SYSEX,
                                 CONTENT_SETTINGS_TYPE_MIDI_SYSEX,
                                 callback),
       requesting_frame_(requesting_frame),
       display_languages_(display_languages) {}
 
 MidiPermissionInfoBarDelegateAndroid::~MidiPermissionInfoBarDelegateAndroid() {}
 
+std::string MidiPermissionInfoBarDelegateAndroid::GetIdentifier() const {
+  return "MidiPermissionInfoBarDelegateAndroid";
+}
+
 int MidiPermissionInfoBarDelegateAndroid::GetIconId() const {
   return IDR_INFOBAR_MIDI;
 }
 
 base::string16 MidiPermissionInfoBarDelegateAndroid::GetMessageText() const {
   return l10n_util::GetStringFUTF16(
       IDS_MIDI_SYSEX_INFOBAR_QUESTION,
       url_formatter::FormatUrlForSecurityDisplay(requesting_frame_.GetOrigin(),
                                                  display_languages_));
 }