c/b/supervised_user: Use range-based for where appropriate.

chrome/browser/supervised_user/chromeos/manager_password_service.cc

Index: chrome/browser/supervised_user/chromeos/manager_password_service.cc
diff --git a/chrome/browser/supervised_user/chromeos/manager_password_service.cc b/chrome/browser/supervised_user/chromeos/manager_password_service.cc
index af706b0e866edf78a4358613335aa0e16e8c5e61..be91a5e05d2b85974d8d712bf394747ab685cba3 100644
--- a/chrome/browser/supervised_user/chromeos/manager_password_service.cc
+++ b/chrome/browser/supervised_user/chromeos/manager_password_service.cc
@@ -45,15 +45,13 @@ void ManagerPasswordService::Init(
   const user_manager::UserList& users =
       user_manager::UserManager::Get()->GetUsers();
 
-  for (user_manager::UserList::const_iterator it = users.begin();
-       it != users.end();
-       ++it) {
-    if ((*it)->GetType() != user_manager::USER_TYPE_SUPERVISED)
+  for (const auto* user : users) {
+    if (user->GetType() != user_manager::USER_TYPE_SUPERVISED)
       continue;
-    if (user_id != supervised_user_manager->GetManagerUserId((*it)->email()))
+    if (user_id != supervised_user_manager->GetManagerUserId(user->email()))
       continue;
     OnSharedSettingsChange(
-        supervised_user_manager->GetUserSyncId((*it)->email()),
+        supervised_user_manager->GetUserSyncId(user->email()),
         supervised_users::kChromeOSPasswordData);
   }
 }