Have content/ create and destroy its own threads.

chrome/browser/chromeos/login/ownership_service_unittest.cc

 // Copyright (c) 2011 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/ownership_service.h"
 
 #include <string>
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
 #include "base/scoped_temp_dir.h"
 #include "chrome/browser/chromeos/login/mock_owner_key_utils.h"
 #include "chrome/browser/chromeos/login/owner_manager_unittest.h"
 #include "content/public/browser/notification_service.h"
 #include "content/test/test_browser_thread.h"
 #include "crypto/nss_util.h"
 #include "crypto/rsa_private_key.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 205 matching lines @@
 
   base::WaitableEvent event(true, false);
   MockKeyUser delegate(OwnerManager::OPERATION_FAILED, &event);
   service_->StartVerifyAttempt(data, sig, &delegate);
 
   while (!event.IsSignaled())
     message_loop_.RunAllPending();
 }
 
 }  // namespace chromeos