net: remove DNS certificate checking code.

net/url_request/url_request_context_storage.cc

Index: net/url_request/url_request_context_storage.cc
diff --git a/net/url_request/url_request_context_storage.cc b/net/url_request/url_request_context_storage.cc
index 4f0a2b0c9f775e37983a20354366732f5987f562..cb29c1b2489c3d65c7c80f07ad77e901703a14de 100644
--- a/net/url_request/url_request_context_storage.cc
+++ b/net/url_request/url_request_context_storage.cc
@@ -16,7 +16,6 @@
 #include "net/http/http_server_properties.h"
 #include "net/http/http_transaction_factory.h"
 #include "net/proxy/proxy_service.h"
-#include "net/socket/dns_cert_provenance_checker.h"
 #include "net/url_request/fraudulent_certificate_reporter.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_job_factory.h"
@@ -51,12 +50,6 @@ void URLRequestContextStorage::set_origin_bound_cert_service(
   origin_bound_cert_service_.reset(origin_bound_cert_service);
 }
 
-void URLRequestContextStorage::set_dns_cert_checker(
-    DnsCertProvenanceChecker* dns_cert_checker) {
-  context_->set_dns_cert_checker(dns_cert_checker);
-  dns_cert_checker_.reset(dns_cert_checker);
-}
-
 void URLRequestContextStorage::set_fraudulent_certificate_reporter(
     FraudulentCertificateReporter* fraudulent_certificate_reporter) {
   context_->set_fraudulent_certificate_reporter(