Add method for identifying different InfoBars

chrome/browser/chrome_quota_permission_context.cc

Index: chrome/browser/chrome_quota_permission_context.cc
diff --git a/chrome/browser/chrome_quota_permission_context.cc b/chrome/browser/chrome_quota_permission_context.cc
index 86e836882179e8e34c6565149d8c614c7186e6d6..8f13e0a51beabab0735e209f38a4c1589b84b021 100644
--- a/chrome/browser/chrome_quota_permission_context.cc
+++ b/chrome/browser/chrome_quota_permission_context.cc
@@ -168,6 +168,7 @@ class RequestQuotaInfoBarDelegate : public ConfirmInfoBarDelegate {
   ~RequestQuotaInfoBarDelegate() override;
 
   // ConfirmInfoBarDelegate:
+  std::string GetIdentifier() const override;
   base::string16 GetMessageText() const override;
   bool Accept() override;
   bool Cancel() override;
@@ -216,6 +217,10 @@ RequestQuotaInfoBarDelegate::~RequestQuotaInfoBarDelegate() {
   }
 }
 
+std::string RequestQuotaInfoBarDelegate::GetIdentifier() const {
+  return "RequestQuotaInfoBarDelegate";
+}
+
 base::string16 RequestQuotaInfoBarDelegate::GetMessageText() const {
   // If the site requested larger quota than this threshold, show a different
   // message to the user.