cros: Use first unlock user's pref for locking screen.

chrome/browser/chromeos/login/screen_locker.cc

Index: chrome/browser/chromeos/login/screen_locker.cc
diff --git a/chrome/browser/chromeos/login/screen_locker.cc b/chrome/browser/chromeos/login/screen_locker.cc
index a76a7f788e589ecec856213ddac2e5f2f8d850cd..a04f3578b309b6951e1cdd54ded202d5d4b6ce41 100644
--- a/chrome/browser/chromeos/login/screen_locker.cc
+++ b/chrome/browser/chromeos/login/screen_locker.cc
@@ -227,12 +227,8 @@ void ScreenLocker::OnLoginSuccess(const UserContext& user_context) {
     }
   }
 
-  if (const User* user = UserManager::Get()->FindUser(user_context.username)) {
-    if (!user->is_active())
-      UserManager::Get()->SwitchActiveUser(user_context.username);
-  } else {
+  if (!UserManager::Get()->FindUser(user_context.username))
     NOTREACHED() << "Logged in user not found.";
-  }
 
   authentication_capture_.reset(new AuthenticationParametersCapture());
   authentication_capture_->user_context = user_context;