net: add DNS certificate revocation experiment.

net/url_request/url_request_context.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/url_request/url_request_context.h"
 
 #include "base/compiler_specific.h"
 #include "base/string_util.h"
+#include "net/base/dnsrr_resolver.h"
 #include "net/base/host_resolver.h"
 #include "net/cookies/cookie_store.h"
 #include "net/ftp/ftp_transaction_factory.h"
 #include "net/http/http_transaction_factory.h"
 
 namespace net {
 
 URLRequestContext::URLRequestContext()
     : ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)),
       net_log_(NULL),
       host_resolver_(NULL),
       cert_verifier_(NULL),
       origin_bound_cert_service_(NULL),
       fraudulent_certificate_reporter_(NULL),
       http_auth_handler_factory_(NULL),
       proxy_service_(NULL),
       network_delegate_(NULL),
       http_server_properties_(NULL),
       transport_security_state_(NULL),
       ftp_auth_cache_(new FtpAuthCache),
       http_transaction_factory_(NULL),
       ftp_transaction_factory_(NULL),
-      job_factory_(NULL) {
+      job_factory_(NULL),
+      dnsrr_resolver_(new DnsRRResolver) {
 }
 
 void URLRequestContext::CopyFrom(URLRequestContext* other) {
   // Copy URLRequestContext parameters.
   set_net_log(other->net_log());
   set_host_resolver(other->host_resolver());
   set_cert_verifier(other->cert_verifier());
   set_origin_bound_cert_service(other->origin_bound_cert_service());
   set_fraudulent_certificate_reporter(other->fraudulent_certificate_reporter());
   set_http_auth_handler_factory(other->http_auth_handler_factory());
@@ skipping 17 matching lines @@
 }
 
 const std::string& URLRequestContext::GetUserAgent(const GURL& url) const {
   return EmptyString();
 }
 
 URLRequestContext::~URLRequestContext() {
 }
 
 }  // namespace net