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

chrome/browser/chromeos/login/login_performer.cc

Index: chrome/browser/chromeos/login/login_performer.cc
diff --git a/chrome/browser/chromeos/login/login_performer.cc b/chrome/browser/chromeos/login/login_performer.cc
index 910cdb2f5af62891fc1db7ac24a94cb7fe535540..a736a38240e802502feee695994907e1776bb9e4 100644
--- a/chrome/browser/chromeos/login/login_performer.cc
+++ b/chrome/browser/chromeos/login/login_performer.cc
@@ -276,7 +276,8 @@ void LoginPerformer::CompleteLogin(const std::string& username,
     StartLoginCompletion();
   } else {
     // Otherwise, do whitelist check first.
-    if (cros_settings->FindEmailInList(kAccountsPrefUsers, username)) {
+    if (cros_settings->FindEmailInList(
+            kAccountsPrefUsers, Authenticator::Canonicalize(username))) {
       StartLoginCompletion();
     } else {
       if (delegate_)