Revert 148418 - Always use chromium threads for IO in remoting host

remoting/jingle_glue/ssl_adapter.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 "remoting/jingle_glue/ssl_adapter.h"
 
 #if defined(OS_WIN)
 #include "third_party/libjingle/source/talk/base/ssladapter.h"
 #else
 #include "remoting/jingle_glue/ssl_socket_adapter.h"
 #endif
 
 namespace remoting {
 
 talk_base::SSLAdapter* CreateSSLAdapter(talk_base::AsyncSocket* socket) {
   talk_base::SSLAdapter* ssl_adapter =
       remoting::SSLSocketAdapter::Create(socket);
   DCHECK(ssl_adapter);
   return ssl_adapter;
 }
 
 }  // namespace remoting