Add method for identifying different InfoBars

chrome/browser/password_manager/save_password_infobar_delegate.cc

Index: chrome/browser/password_manager/save_password_infobar_delegate.cc
diff --git a/chrome/browser/password_manager/save_password_infobar_delegate.cc b/chrome/browser/password_manager/save_password_infobar_delegate.cc
index 6a831b9509ff8aea716352ab227a35d673c01f31..cc47b14824bda0f71a3ba9c5632b15a0d5502f6f 100644
--- a/chrome/browser/password_manager/save_password_infobar_delegate.cc
+++ b/chrome/browser/password_manager/save_password_infobar_delegate.cc
@@ -121,6 +121,11 @@ base::string16 SavePasswordInfoBarDelegate::GetFirstRunExperienceMessage() {
              : base::string16();
 }
 
+infobars::InfoBarDelegate::InfoBarIdentifier
+SavePasswordInfoBarDelegate::GetIdentifier() const {
+  return SAVE_PASSWORD_INFOBAR_DELEGATE_ID;
+}
+
 void SavePasswordInfoBarDelegate::InfoBarDismissed() {
   DCHECK(form_to_save_.get());
   infobar_response_ = password_manager::metrics_util::INFOBAR_DISMISSED;