Add method for identifying different InfoBars

chrome/browser/plugins/chrome_plugin_service_filter.cc

Index: chrome/browser/plugins/chrome_plugin_service_filter.cc
diff --git a/chrome/browser/plugins/chrome_plugin_service_filter.cc b/chrome/browser/plugins/chrome_plugin_service_filter.cc
index 6fc88d83df9d295d226dd6b22d74ad6777e39b53..fd1fa5160ec5cfea62a1defd133dded36e84f785 100644
--- a/chrome/browser/plugins/chrome_plugin_service_filter.cc
+++ b/chrome/browser/plugins/chrome_plugin_service_filter.cc
@@ -77,6 +77,7 @@ class NPAPIRemovalInfoBarDelegate : public ConfirmInfoBarDelegate {
   ~NPAPIRemovalInfoBarDelegate() override;
 
   // ConfirmInfobarDelegate:
+  infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
   int GetIconId() const override;
   base::string16 GetMessageText() const override;
   int GetButtons() const override;
@@ -151,6 +152,11 @@ NPAPIRemovalInfoBarDelegate::NPAPIRemovalInfoBarDelegate(
 NPAPIRemovalInfoBarDelegate::~NPAPIRemovalInfoBarDelegate() {
 }
 
+infobars::InfoBarDelegate::InfoBarIdentifier
+NPAPIRemovalInfoBarDelegate::GetIdentifier() const {
+  return NPAPI_REMOVAL_INFOBAR_DELEGATE;
+}
+
 int NPAPIRemovalInfoBarDelegate::GetIconId() const {
   return IDR_INFOBAR_WARNING;
 }