This CL replaces e-mail with AccountId in easy signin code.

chrome/browser/chromeos/login/lock/webui_screen_locker.cc

Index: chrome/browser/chromeos/login/lock/webui_screen_locker.cc
diff --git a/chrome/browser/chromeos/login/lock/webui_screen_locker.cc b/chrome/browser/chromeos/login/lock/webui_screen_locker.cc
index 318f36b4c5cadcff96526272b486e4ffc3b90162..4cdb39c856268417025d780055bea6b9492ffeca 100644
--- a/chrome/browser/chromeos/login/lock/webui_screen_locker.cc
+++ b/chrome/browser/chromeos/login/lock/webui_screen_locker.cc
@@ -282,7 +282,7 @@ void WebUIScreenLocker::Signout() {
   chromeos::ScreenLocker::default_screen_locker()->Signout();
 }
 
-bool WebUIScreenLocker::IsUserWhitelisted(const std::string& user_id) {
+bool WebUIScreenLocker::IsUserWhitelisted(const AccountId& account_id) {
   NOTREACHED();
   return true;
 }