Add method for identifying different InfoBars

chrome/browser/infobars/insecure_content_infobar_delegate.cc

Index: chrome/browser/infobars/insecure_content_infobar_delegate.cc
diff --git a/chrome/browser/infobars/insecure_content_infobar_delegate.cc b/chrome/browser/infobars/insecure_content_infobar_delegate.cc
index ef14ecd8ba503bfe7a45e6d05935d7c89c66bc8d..cdb6868a0b9ae2d3a15e07f607f134ca83ef810f 100644
--- a/chrome/browser/infobars/insecure_content_infobar_delegate.cc
+++ b/chrome/browser/infobars/insecure_content_infobar_delegate.cc
@@ -48,6 +48,10 @@ InsecureContentInfoBarDelegate::InsecureContentInfoBarDelegate()
 InsecureContentInfoBarDelegate::~InsecureContentInfoBarDelegate() {
 }
 
+std::string InsecureContentInfoBarDelegate::GetIdentifier() const {
+  return "InsecureContentInfoBarDelegate";
+}
+
 void InsecureContentInfoBarDelegate::InfoBarDismissed() {
   UMA_HISTOGRAM_ENUMERATION("InsecureContentInfoBarDelegateV2",
                             DISPLAY_INFOBAR_DISMISSED, NUM_EVENTS);