Do GetAdaptersAddresses on a worker thread.

net/proxy/dhcp_proxy_script_adapter_fetcher_win.h

 // 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.
 
 #ifndef NET_PROXY_DHCP_SCRIPT_ADAPTER_FETCHER_WIN_H_
 #define NET_PROXY_DHCP_SCRIPT_ADAPTER_FETCHER_WIN_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 93 matching lines @@
     STATE_FINISH,
     STATE_CANCEL,
   };
 
   State state() const;
 
   // This inner class is used to encapsulate the worker thread, which has
   // only a weak reference back to the main object, so that the main object
   // can be destroyed before the thread ends.  This also keeps the main
   // object completely thread safe and allows it to be non-refcounted.
+  //
+  // TODO(joi): Replace with PostTaskAndReply once http://crbug.com/86301
+  // has been implemented.
   class NET_TEST WorkerThread
       : public base::RefCountedThreadSafe<WorkerThread> {
    public:
     // Creates and initializes (but does not start) the worker thread.
     explicit WorkerThread(
         const base::WeakPtr<DhcpProxyScriptAdapterFetcher>& owner);
     virtual ~WorkerThread();
 
     // Starts the worker thread, fetching information for |adapter_name| using
     // |get_pac_from_url_func|.
@@ skipping 70 matching lines @@
   base::OneShotTimer<DhcpProxyScriptAdapterFetcher> wait_timer_;
 
   scoped_refptr<URLRequestContext> url_request_context_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(DhcpProxyScriptAdapterFetcher);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_DHCP_SCRIPT_ADAPTER_FETCHER_WIN_H_