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

chrome/browser/ui/webui/web_ui_test_handler.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/ui/webui/web_ui_test_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 87 matching lines @@
 }
 
 bool WebUITestHandler::WaitForResult() {
   SCOPED_TRACE("WebUITestHandler::WaitForResult");
   test_done_ = false;
   run_test_done_ = false;
   is_waiting_ = true;
 
   // Either sync test completion or the testDone() will cause message loop
   // to quit.
-  ui_test_utils::RunMessageLoop();
+  content::RunMessageLoop();
 
   // Run a second message loop when not |run_test_done_| so that the sync test
   // completes, or |run_test_succeeded_| but not |test_done_| so async tests
   // complete.
   if (!run_test_done_ || (run_test_succeeded_ && !test_done_)) {
-    ui_test_utils::RunMessageLoop();
+    content::RunMessageLoop();
   }
 
   is_waiting_ = false;
 
   // To succeed the test must execute as well as pass the test.
   return run_test_succeeded_ && test_succeeded_;
 }