Set up content in-process main threads via factory

content/browser/utility_process_host_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_UTILITY_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_UTILITY_PROCESS_HOST_IMPL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "content/public/browser/browser_child_process_host_delegate.h"
 #include "content/public/browser/utility_process_host.h"
 
 namespace base {
 class SequencedTaskRunner;
+class Thread;
 }
 
 namespace content {
 class BrowserChildProcessHostImpl;
-class UtilityMainThread;
 
 class CONTENT_EXPORT UtilityProcessHostImpl
     : public NON_EXPORTED_BASE(UtilityProcessHost),
       public BrowserChildProcessHostDelegate {
  public:
   UtilityProcessHostImpl(UtilityProcessHostClient* client,
                          base::SequencedTaskRunner* client_task_runner);
   virtual ~UtilityProcessHostImpl();
 
   // UtilityProcessHost implementation:
@@ skipping 40 matching lines @@
 
   // Launch the utility process from the zygote. Defaults to false.
   bool use_linux_zygote_;
 
   base::EnvironmentVector env_;
 
   bool started_;
 
   scoped_ptr<BrowserChildProcessHostImpl> process_;
 
-#if !defined(CHROME_MULTIPLE_DLL)
   // Used in single-process mode instead of process_.
-  scoped_ptr<UtilityMainThread> in_process_thread_;
-#endif
+  scoped_ptr<base::Thread> in_process_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(UtilityProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_UTILITY_PROCESS_HOST_IMPL_H_