Test ExistingThreadLoader.

content/utility/utility_process_control_impl.h

 // Copyright 2015 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.
 
 #ifndef CONTENT_UTILITY_UTILITY_PROCESS_CONTROL_IMPL_H_
 #define CONTENT_UTILITY_UTILITY_PROCESS_CONTROL_IMPL_H_
 
 #include "base/macros.h"
+#include "base/threading/thread.h"
 #include "content/child/process_control_impl.h"
 
 namespace content {
 
 // Customization of ProcessControlImpl for the utility process. Exposed to the
 // browser via the utility process's ServiceRegistry.
 class UtilityProcessControlImpl : public ProcessControlImpl {
  public:
   UtilityProcessControlImpl();
   ~UtilityProcessControlImpl() override;
 
   // ProcessControlImpl:
   void RegisterLoaders(NameToLoaderMap* name_to_loader_map) override;
 
  private:
   void OnLoadFailed() override;
 
+  base::Thread test_thread_;
+
   DISALLOW_COPY_AND_ASSIGN(UtilityProcessControlImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_UTILITY_UTILITY_PROCESS_CONTROL_IMPL_H_