ChromeOS: Fix removeUser button on signin screen.

chrome/browser/chromeos/login/users/chrome_user_manager_impl.h

Index: chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
diff --git a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
index 20cbdbac08fe329345fdbf874d4c277ec8fde75a..206fd43ad741a8b30c5ddadaf7d04c96623e675c 100644
--- a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
+++ b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
@@ -216,10 +216,10 @@ class ChromeUserManagerImpl
   void UpdateUserTimeZoneRefresher(Profile* profile);
 
   // Adds user to the list of the users who should be reported.
-  void AddReportingUser(const std::string& user_id);
+  void AddReportingUser(const AccountId& account_id);
 
   // Removes user from the list of the users who should be reported.
-  void RemoveReportingUser(const std::string& user_id);
+  void RemoveReportingUser(const AccountId& account_id);
 
   // Interface to the signed settings store.
   CrosSettings* cros_settings_;