ChromeOS: Fix removeUser button on signin screen.

chrome/browser/chromeos/login/signin_screen_controller.cc

Index: chrome/browser/chromeos/login/signin_screen_controller.cc
diff --git a/chrome/browser/chromeos/login/signin_screen_controller.cc b/chrome/browser/chromeos/login/signin_screen_controller.cc
index eb0985261098aa611a3e20412ad0cf72c9944b85..dc612d7031377d0db501e10060083a6befe64c46 100644
--- a/chrome/browser/chromeos/login/signin_screen_controller.cc
+++ b/chrome/browser/chromeos/login/signin_screen_controller.cc
@@ -58,17 +58,16 @@ void SignInScreenController::OnSigninScreenReady() {
   }
 }
 
-void SignInScreenController::RemoveUser(const std::string& user_id) {
-  user_manager::UserManager::Get()->RemoveUser(
-      AccountId::FromUserEmail(user_id), this);
+void SignInScreenController::RemoveUser(const AccountId& account_id) {
+  user_manager::UserManager::Get()->RemoveUser(account_id, this);
 }
 
-void SignInScreenController::OnBeforeUserRemoved(const std::string& username) {
-  user_selection_screen_->OnBeforeUserRemoved(username);
+void SignInScreenController::OnBeforeUserRemoved(const AccountId& account_id) {
+  user_selection_screen_->OnBeforeUserRemoved(account_id);
 }
 
-void SignInScreenController::OnUserRemoved(const std::string& username) {
-  user_selection_screen_->OnUserRemoved(username);
+void SignInScreenController::OnUserRemoved(const AccountId& account_id) {
+  user_selection_screen_->OnUserRemoved(account_id);
 }
 
 void SignInScreenController::SendUserList() {