Move ui_test_utils::RunMessageLoop to test_utils so that it can be reused by content_browsertests.

chrome/browser/chromeos/login/screen_locker_tester.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/login/screen_locker_tester.h"
 
 #include <string>
 
 #include "base/string_util.h"
 #include "base/stringprintf.h"
@@ skipping 55 matching lines @@
   locker_->SetLoginStatusConsumer(this);
 }
 
 LoginAttemptObserver::~LoginAttemptObserver() {
   locker_->SetLoginStatusConsumer(NULL);
 }
 
 void LoginAttemptObserver::WaitForAttempt() {
   if (!login_attempted_) {
     waiting_ = true;
-    ui_test_utils::RunMessageLoop();
+    content::RunMessageLoop();
     waiting_ = false;
   }
   ASSERT_TRUE(login_attempted_);
 }
 
 void LoginAttemptObserver::LoginAttempted() {
   login_attempted_ = true;
   if (waiting_)
     MessageLoopForUI::current()->Quit();
 }
@@ skipping 119 matching lines @@
       new MockAuthenticator(ScreenLocker::screen_locker_, user, password));
 }
 
 }  // namespace test
 
 test::ScreenLockerTester* ScreenLocker::GetTester() {
   return new test::WebUIScreenLockerTester();
 }
 
 }  // namespace chromeos