[cros] Display emails of users are stored in a separate dictionary in Local State.

chrome/browser/chromeos/login/webui_screen_locker.cc

Index: chrome/browser/chromeos/login/webui_screen_locker.cc
diff --git a/chrome/browser/chromeos/login/webui_screen_locker.cc b/chrome/browser/chromeos/login/webui_screen_locker.cc
index 8f328b55c5fb67f4a7a2fa719eb7ea5f73fab201..9323dff9be9435e86bd7a5aafc4849c28fbd28cb 100644
--- a/chrome/browser/chromeos/login/webui_screen_locker.cc
+++ b/chrome/browser/chromeos/login/webui_screen_locker.cc
@@ -145,6 +145,10 @@ void WebUIScreenLocker::FixCaptivePortal() {
   NOTREACHED();
 }
 
+void WebUIScreenLocker::SetDisplayEmail(const std::string& email) {
+  NOTREACHED();
+}
+
 void WebUIScreenLocker::CompleteLogin(const std::string& username,
                                       const std::string& password) {
   NOTREACHED();