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

chrome/browser/extensions/app_process_apitest.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/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/process_map.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 477 matching lines @@
 
   // Load the launcher extension, which should launch the app.
   ui_test_utils::NavigateToURLWithDisposition(
       browser(),
       launcher->GetResourceURL("main.html"),
       CURRENT_TAB,
       ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
 
   // Wait for app tab to be created and loaded.
   test_navigation_observer.WaitForObservation(
-      base::Bind(&ui_test_utils::RunMessageLoop),
+      base::Bind(&content::RunMessageLoop),
       base::Bind(&MessageLoop::Quit,
                  base::Unretained(MessageLoopForUI::current())));
 
   // App has loaded, and chrome.app.isInstalled should be true.
   bool is_installed = false;
   ASSERT_TRUE(content::ExecuteJavaScriptAndExtractBool(
       chrome::GetActiveWebContents(browser())->GetRenderViewHost(), L"",
       L"window.domAutomationController.send(chrome.app.isInstalled)",
       &is_installed));
   ASSERT_TRUE(is_installed);
@@ skipping 74 matching lines @@
       content::Source<NavigationController>(
           &chrome::GetActiveWebContents(browser())->GetController()));
   chrome::Reload(browser(), CURRENT_TAB);
   observer.Wait();
   ASSERT_TRUE(content::ExecuteJavaScriptAndExtractBool(
       contents->GetRenderViewHost(), L"",
       L"window.domAutomationController.send(chrome.app.isInstalled)",
       &is_installed));
   ASSERT_TRUE(is_installed);
 }