Massively simplify the NetworkChangeNotifier infrastructure:...

net/tools/fetch/fetch_client.cc

Index: net/tools/fetch/fetch_client.cc
===================================================================
--- net/tools/fetch/fetch_client.cc	(revision 50775)
+++ net/tools/fetch/fetch_client.cc	(working copy)
@@ -133,7 +133,7 @@
   MessageLoop loop(MessageLoop::TYPE_IO);
 
   scoped_refptr<net::HostResolver> host_resolver(
-      net::CreateSystemHostResolver(NULL));
+      net::CreateSystemHostResolver());
 
   scoped_refptr<net::ProxyService> proxy_service(
       net::ProxyService::CreateNull());
@@ -143,18 +143,14 @@
   scoped_ptr<net::HttpAuthHandlerFactory> http_auth_handler_factory(
       net::HttpAuthHandlerFactory::CreateDefault());
   if (use_cache) {
-    factory = new net::HttpCache(NULL, host_resolver, proxy_service,
-                                 ssl_config_service,
-                                 http_auth_handler_factory.get(),
-                                 NULL,
-                                 NULL,
-                                 net::HttpCache::DefaultBackend::InMemory(0));
+    factory = new net::HttpCache(host_resolver, proxy_service,
+        ssl_config_service, http_auth_handler_factory.get(), NULL, NULL,
+        net::HttpCache::DefaultBackend::InMemory(0));
   } else {
     factory = new net::HttpNetworkLayer(
-        net::ClientSocketFactory::GetDefaultFactory(), NULL, host_resolver,
+        net::ClientSocketFactory::GetDefaultFactory(), host_resolver,
         proxy_service, ssl_config_service, http_auth_handler_factory.get(),
-        NULL,
-        NULL);
+        NULL, NULL);
   }
 
   {