net: replace DnsRRResoler with TransportSecurityState in plumbing.

net/url_request/url_request_context.h

Index: net/url_request/url_request_context.h
diff --git a/net/url_request/url_request_context.h b/net/url_request/url_request_context.h
index 1ac2b16311df127f97a9de0f67b66813279bbed0..b3ccd3b74b9fea86345f881ee1a2b233619d4666 100644
--- a/net/url_request/url_request_context.h
+++ b/net/url_request/url_request_context.h
@@ -26,7 +26,6 @@ namespace net {
 class CertVerifier;
 class CookieStore;
 class DnsCertProvenanceChecker;
-class DnsRRResolver;
 class FraudulentCertificateReporter;
 class FtpTransactionFactory;
 class HostResolver;
@@ -88,14 +87,6 @@ class NET_EXPORT URLRequestContext
     origin_bound_cert_service_ = origin_bound_cert_service;
   }
 
-  DnsRRResolver* dnsrr_resolver() const {
-    return dnsrr_resolver_;
-  }
-
-  void set_dnsrr_resolver(DnsRRResolver* dnsrr_resolver) {
-    dnsrr_resolver_ = dnsrr_resolver;
-  }
-
   DnsCertProvenanceChecker* dns_cert_checker() const {
     return dns_cert_checker_;
   }
@@ -225,7 +216,6 @@ class NET_EXPORT URLRequestContext
   HostResolver* host_resolver_;
   CertVerifier* cert_verifier_;
   OriginBoundCertService* origin_bound_cert_service_;
-  DnsRRResolver* dnsrr_resolver_;
   DnsCertProvenanceChecker* dns_cert_checker_;
   FraudulentCertificateReporter* fraudulent_certificate_reporter_;
   HttpAuthHandlerFactory* http_auth_handler_factory_;