Add method for identifying different InfoBars

chrome/browser/android/media/media_throttle_infobar_delegate.cc

 // Copyright 2015 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/android/media/media_throttle_infobar_delegate.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/metrics/histogram_macros.h"
@@ skipping 34 matching lines @@
     : infobar_response_(UMA_THROTTLE_INFOBAR_NO_RESPONSE),
       decode_granted_callback_(callback) {
 }
 
 MediaThrottleInfoBarDelegate::~MediaThrottleInfoBarDelegate() {
   UMA_HISTOGRAM_ENUMERATION("Media.Android.ThrottleInfobarResponse",
                             infobar_response_,
                             UMA_THROTTLE_INFOBAR_RESPONSE_COUNT);
 }
 
+infobars::InfoBarDelegate::InfoBarIdentifier
+MediaThrottleInfoBarDelegate::GetIdentifier() const {
+  return MEDIA_THROTTLE_INFOBAR_DELEGATE;
+}
+
 MediaThrottleInfoBarDelegate*
     MediaThrottleInfoBarDelegate::AsMediaThrottleInfoBarDelegate() {
   return this;
 }
 
 base::string16 MediaThrottleInfoBarDelegate::GetMessageText() const {
   return l10n_util::GetStringUTF16(IDS_MEDIA_THROTTLE_INFOBAR_TEXT);
 }
 
 int MediaThrottleInfoBarDelegate::GetIconId() const {
@@ skipping 16 matching lines @@
 bool MediaThrottleInfoBarDelegate::Cancel() {
   infobar_response_ = UMA_THROTTLE_INFOBAR_TRY_AGAIN;
   decode_granted_callback_.Run(true);
   return true;
 }
 
 void MediaThrottleInfoBarDelegate::InfoBarDismissed() {
   infobar_response_ = UMA_THROTTLE_INFOBAR_DISMISSED;
   decode_granted_callback_.Run(false);
 }