Use base::MessageLoopProxy instead of MessageLoop in ProxyConfigServiceLinux.

net/proxy/proxy_service.cc

 // 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.
 
 #include "net/proxy/proxy_service.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 1406 matching lines @@
   // running gconf calls from.
   MessageLoop* glib_default_loop = MessageLoopForUI::current();
 
   // The file loop should be a MessageLoopForIO on Linux.
   DCHECK_EQ(MessageLoop::TYPE_IO, file_loop->type());
 
   // Synchronously fetch the current proxy config (since we are
   // running on glib_default_loop). Additionally register for
   // notifications (delivered in either |glib_default_loop| or
   // |file_loop|) to keep us updated when the proxy config changes.
-  linux_config_service->SetupAndFetchInitialConfig(glib_default_loop, io_loop,
+  linux_config_service->SetupAndFetchInitialConfig(
+      glib_default_loop->message_loop_proxy(),
+      io_loop->message_loop_proxy(),
       static_cast<MessageLoopForIO*>(file_loop));
 
   return linux_config_service;
 #else
   LOG(WARNING) << "Failed to choose a system proxy settings fetcher "
                   "for this platform.";
   return new ProxyConfigServiceDirect();
 #endif
 }
 
@@ skipping 179 matching lines @@
     OnCompletion(result_);
   }
 }
 
 void SyncProxyServiceHelper::OnCompletion(int rv) {
   result_ = rv;
   event_.Signal();
 }
 
 }  // namespace net