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 f90279d5eda152f25563cdf5d8b6ec95c9a62798..95b3b0238086e2e391d8f1ec83a2e93919987cd4 100644
--- a/chrome/browser/chrome_quota_permission_context.cc
+++ b/chrome/browser/chrome_quota_permission_context.cc
@@ -172,6 +172,7 @@ class RequestQuotaInfoBarDelegate : public ConfirmInfoBarDelegate {
   ~RequestQuotaInfoBarDelegate() override;
 
   // ConfirmInfoBarDelegate:
+  infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
   base::string16 GetMessageText() const override;
   bool Accept() override;
   bool Cancel() override;
@@ -219,6 +220,11 @@ RequestQuotaInfoBarDelegate::~RequestQuotaInfoBarDelegate() {
   }
 }
 
+infobars::InfoBarDelegate::InfoBarIdentifier
+RequestQuotaInfoBarDelegate::GetIdentifier() const {
+  return REQUEST_QUOTA_INFOBAR_DELEGATE;
+}
+
 base::string16 RequestQuotaInfoBarDelegate::GetMessageText() const {
   // If the site requested larger quota than this threshold, show a different
   // message to the user.