Massively simplify the NetworkChangeNotifier infrastructure:...

net/tools/hresolv/hresolv.cc

 // Copyright (c) 2010 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.
 
 // hrseolv is a command line utility which runs the HostResolver in the
 // Chromium network stack.
 //
 // The user specifies the hosts to lookup and when to look them up.
 // The hosts must be specified in order.
 // The hosts can be contained in a file or on the command line. If no
@@ skipping 429 matching lines @@
       exit(1);
     }
   }
 
   net::HostCache* cache = new net::HostCache(
       options.cache_size,
       base::TimeDelta::FromMilliseconds(options.cache_ttl),
       base::TimeDelta::FromSeconds(0));
 
   scoped_refptr<net::HostResolver> host_resolver(
-      new net::HostResolverImpl(NULL, cache, NULL, 100u));
+      new net::HostResolverImpl(NULL, cache, 100u));
   ResolverInvoker invoker(host_resolver.get());
   invoker.ResolveAll(hosts_and_times, options.async);
 
   CommandLine::Reset();
   return 0;
 }