net: remove DNS certificate checking code.

chrome/browser/net/chrome_dns_cert_provenance_checker_factory.h

-// 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.
-
-#ifndef CHROME_BROWSER_NET_CHROME_DNS_CERT_PROVENANCE_CHECKER_FACTORY
-#define CHROME_BROWSER_NET_CHROME_DNS_CERT_PROVENANCE_CHECKER_FACTORY
-#pragma once
-
-#include "net/socket/dns_cert_provenance_checker.h"
-
-// WARNING: This factory abstraction is needed because we cannot link NSS code
-// into a .cc file which is included by both Chrome and Chrome Frame. This
-// factory exists so that common code links only against the factory code.
-// Chrome specific code will link against the NSS using code in
-// chrome_dns_cert_provenance_checker.cc and hand a function pointer to this
-// code.
-
-namespace net {
-class DnsRRResolver;
-}
-
-class ChromeURLRequestContext;
-
-// A DnsCertProvenanceCheckerFactory is a function pointer to a factory
-// function for DnsCertProvenanceCheckerFactory objects.
-typedef net::DnsCertProvenanceChecker* (*DnsCertProvenanceCheckerFactory) (
-    net::DnsRRResolver* dnsrr_resolver,
-    ChromeURLRequestContext* url_req_context);
-
-// Return a new DnsCertProvenanceChecker. Caller takes ownership. May return
-// NULL if no factory function has been set.
-net::DnsCertProvenanceChecker* CreateDnsCertProvenanceChecker(
-    net::DnsRRResolver* dnsrr_resolver,
-    ChromeURLRequestContext* url_req_context);
-
-void SetDnsCertProvenanceCheckerFactory(DnsCertProvenanceCheckerFactory);
-
-#endif  // CHROME_BROWSER_NET_CHROME_DNS_CERT_PROVENANCE_CHECKER_FACTORY