Set up content in-process main threads via factory

content/browser/renderer_host/render_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_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
 
 #include <map>
 #include <queue>
 #include <string>
@@ skipping 246 matching lines @@
 
   enum {
     // This is the maximum size of |cached_dibs_|
     MAX_MAPPED_TRANSPORT_DIBS = 3,
   };
 
   void ClearTransportDIBCache();
   // This is used to clear our cache five seconds after the last use.
   base::DelayTimer<RenderProcessHostImpl> cached_dibs_cleaner_;
 
-#if !defined(CHROME_MULTIPLE_DLL)
   // Used in single-process mode.
-  scoped_ptr<RendererMainThread> in_process_renderer_;
-#endif
+  scoped_ptr<base::Thread> in_process_renderer_;
 
   // True after Init() has been called. We can't just check channel_ because we
   // also reset that in the case of process termination.
   bool is_initialized_;
 
   // Used to launch and terminate the process without blocking the UI thread.
   scoped_ptr<ChildProcessLauncher> child_process_launcher_;
 
   // Messages we queue while waiting for the process handle.  We queue them here
   // instead of in the channel so that we ensure they're sent after init related
@@ skipping 42 matching lines @@
 
   // Forwards power state messages to the renderer process.
   PowerMonitorMessageBroadcaster power_monitor_broadcaster_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_