* Move the global "DnsResolutionObserver" code depended on by DNS prefetcher,...

net/http/http_network_transaction.cc

 // Copyright (c) 2006-2009 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/http/http_network_transaction.h"
 
 #include "base/scoped_ptr.h"
 #include "base/compiler_specific.h"
 #include "base/field_trial.h"
 #include "base/string_util.h"
@@ skipping 552 matching lines @@
     host = proxy_server.HostNoBrackets();
     port = proxy_server.port();
   } else {
     host = request_->url.HostNoBrackets();
     port = request_->url.EffectiveIntPort();
   }
   if (!using_proxy_)
     connection_group.append(request_->url.GetOrigin().spec());
 
   DCHECK(!connection_group.empty());
-  int rv = connection_.Init(connection_group, host, port, request_->priority,
+
+  HostResolver::RequestInfo resolve_info(host, port);
+
+  // The referrer is used by the DNS prefetch system to corellate resolutions
+  // with the page that triggered them. It doesn't impact the actual addresses
+  // that we resolve to.
+  resolve_info.set_referrer(request_->referrer);
+
+// TODO(eroman): Enable this!
+// Needs some unit-tests before turning on.
+// http://crbug.com/13163
+#if 0
+  // If the user is refreshing the page, bypass the host cache.
+  if (request_->load_flags & LOAD_BYPASS_CACHE ||
+      request_->load_flags & LOAD_DISABLE_CACHE) {
+    resolve_info.allow_cached_response = false;
+  }
+#endif
+
+  int rv = connection_.Init(connection_group, resolve_info, request_->priority,
                             &io_callback_);
   return rv;
 }
 
 int HttpNetworkTransaction::DoInitConnectionComplete(int result) {
   if (result < 0)
     return ReconsiderProxyAfterError(result);
 
   DCHECK(connection_.is_initialized());
 
@@ skipping 1065 matching lines @@
     host_and_port = proxy_info_.proxy_server().host_and_port();
   } else {
     DCHECK(target == HttpAuth::AUTH_SERVER);
     host_and_port = GetHostAndPort(request_->url);
   }
   auth_info->host_and_port = ASCIIToWide(host_and_port);
   response_.auth_challenge = auth_info;
 }
 
 }  // namespace net