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..fdfe411c0b01882c46dc889b6b622d44c9ab8223 100644
--- a/chrome/browser/password_manager/save_password_infobar_delegate.cc
+++ b/chrome/browser/password_manager/save_password_infobar_delegate.cc
@@ -121,6 +121,10 @@ base::string16 SavePasswordInfoBarDelegate::GetFirstRunExperienceMessage() {
              : base::string16();
 }
 
+std::string SavePasswordInfoBarDelegate::GetIdentifier() const {
+  return "SavePasswordInfoBarDelegate";
+}
+
 void SavePasswordInfoBarDelegate::InfoBarDismissed() {
   DCHECK(form_to_save_.get());
   infobar_response_ = password_manager::metrics_util::INFOBAR_DISMISSED;