Remove calls to deprecated MessageLoop methods in content.

content/browser/fileapi/file_system_dir_url_request_job_unittest.cc

 // Copyright 2013 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 <stdint.h>
 #include <string>
 #include <utility>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 167 matching lines @@
     delegate_->set_quit_on_redirect(true);
     job_factory_.reset(new FileSystemDirURLRequestJobFactory(
         url.GetOrigin().host(), file_system_context));
     empty_context_.set_job_factory(job_factory_.get());
 
     request_ = empty_context_.CreateRequest(
         url, net::DEFAULT_PRIORITY, delegate_.get());
     request_->Start();
     ASSERT_TRUE(request_->is_pending());  // verify that we're starting async
     if (run_to_completion)
-      base::MessageLoop::current()->Run();
+      base::RunLoop().Run();
   }
 
   void TestRequest(const GURL& url) {
     TestRequestHelper(url, true, file_system_context_.get());
   }
 
   void TestRequestWithContext(const GURL& url,
                               FileSystemContext* file_system_context) {
     TestRequestHelper(url, true, file_system_context);
   }
@@ skipping 256 matching lines @@
   ASSERT_FALSE(request_->status().is_success());
   EXPECT_EQ(net::ERR_FILE_NOT_FOUND, request_->status().error());
 
   ASSERT_FALSE(
       storage::ExternalMountPoints::GetSystemInstance()->RevokeFileSystem(
           kValidExternalMountPoint));
 }
 
 }  // namespace
 }  // namespace content