Add method for identifying different InfoBars

chrome/browser/plugins/plugin_infobar_delegates.cc

Index: chrome/browser/plugins/plugin_infobar_delegates.cc
diff --git a/chrome/browser/plugins/plugin_infobar_delegates.cc b/chrome/browser/plugins/plugin_infobar_delegates.cc
index 92b4640208b4bcb1abe8397e4fef1407d5fab55e..cde762704563026b21c07f06fc7797121e892201 100644
--- a/chrome/browser/plugins/plugin_infobar_delegates.cc
+++ b/chrome/browser/plugins/plugin_infobar_delegates.cc
@@ -102,6 +102,10 @@ OutdatedPluginInfoBarDelegate::~OutdatedPluginInfoBarDelegate() {
   content::RecordAction(UserMetricsAction("OutdatedPluginInfobar.Closed"));
 }
 
+std::string OutdatedPluginInfoBarDelegate::GetIdentifier() const {
+  return "OutdatedPluginInfoBarDelegate";
+}
+
 void OutdatedPluginInfoBarDelegate::InfoBarDismissed() {
   content::RecordAction(UserMetricsAction("OutdatedPluginInfobar.Dismissed"));
 }
@@ -233,6 +237,10 @@ PluginMetroModeInfoBarDelegate::PluginMetroModeInfoBarDelegate(
 PluginMetroModeInfoBarDelegate::~PluginMetroModeInfoBarDelegate() {
 }
 
+std::string PluginMetroModeInfoBarDelegate::GetIdentifier() const {
+  return "PluginMetroModeInfoBarDelegate";
+}
+
 int PluginMetroModeInfoBarDelegate::GetIconId() const {
   return IDR_INFOBAR_PLUGIN_INSTALL;
 }