net: remove DNS certificate checking code.

net/http/http_cache.cc

Index: net/http/http_cache.cc
diff --git a/net/http/http_cache.cc b/net/http/http_cache.cc
index 8d79918dcdfb2b0750a7e9af2da73e22ecc48ed4..78b0eaf39d3f64cecc30864415d1d264bf8e5501 100644
--- a/net/http/http_cache.cc
+++ b/net/http/http_cache.cc
@@ -46,7 +46,6 @@ HttpNetworkSession* CreateNetworkSession(
     CertVerifier* cert_verifier,
     OriginBoundCertService* origin_bound_cert_service,
     TransportSecurityState* transport_security_state,
-    DnsCertProvenanceChecker* dns_cert_checker,
     ProxyService* proxy_service,
     SSLHostInfoFactory* ssl_host_info_factory,
     const std::string& ssl_session_cache_shard,
@@ -60,7 +59,6 @@ HttpNetworkSession* CreateNetworkSession(
   params.cert_verifier = cert_verifier;
   params.origin_bound_cert_service = origin_bound_cert_service;
   params.transport_security_state = transport_security_state;
-  params.dns_cert_checker = dns_cert_checker;
   params.proxy_service = proxy_service;
   params.ssl_host_info_factory = ssl_host_info_factory;
   params.ssl_session_cache_shard = ssl_session_cache_shard;
@@ -321,7 +319,6 @@ HttpCache::HttpCache(HostResolver* host_resolver,
                      CertVerifier* cert_verifier,
                      OriginBoundCertService* origin_bound_cert_service,
                      TransportSecurityState* transport_security_state,
-                     DnsCertProvenanceChecker* dns_cert_checker_,
                      ProxyService* proxy_service,
                      const std::string& ssl_session_cache_shard,
                      SSLConfigService* ssl_config_service,
@@ -344,7 +341,6 @@ HttpCache::HttpCache(HostResolver* host_resolver,
                   cert_verifier,
                   origin_bound_cert_service,
                   transport_security_state,
-                  dns_cert_checker_,
                   proxy_service,
                   ssl_host_info_factory_.get(),
                   ssl_session_cache_shard,