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

chrome/browser/extensions/crx_installer_browsertest.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/download/download_crx_util.h"
 #include "chrome/browser/download/download_service.h"
 #include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/download/download_test_observer.h"
 #include "chrome/browser/extensions/crx_installer.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
@@ skipping 89 matching lines @@
           scoped_ptr<base::DictionaryValue>(parsed_manifest));
     }
 
     scoped_refptr<CrxInstaller> installer(
         CrxInstaller::Create(service,
                              mock_install_prompt, /* ownership transferred */
                              approval.get()       /* keep ownership */));
     installer->set_allow_silent_install(true);
     installer->set_is_gallery_install(true);
     installer->InstallCrx(PackExtension(ext_path));
-    ui_test_utils::RunMessageLoop();
+    content::RunMessageLoop();
 
     EXPECT_TRUE(mock_install_prompt->did_succeed());
     return installer;
   }
 
   // Installs an extension and checks that it has scopes granted IFF
   // |record_oauth2_grant| is true.
   void CheckHasEmptyScopesAfterInstall(const std::string& ext_relpath,
                                        bool record_oauth2_grant) {
     CommandLine::ForCurrentProcess()->AppendSwitch(
@@ skipping 147 matching lines @@
       EXPECT_EQ(string16(), mock_prompt->error()) << kTestData[i];
     } else {
       EXPECT_EQ(l10n_util::GetStringUTF16(
           IDS_EXTENSION_INSTALL_DISALLOWED_ON_SITE),
           mock_prompt->error()) << kTestData[i];
     }
   }
 }
 
 }  // namespace extensions