net: perform a non-A DNS lookup for HTTPS hosts.

net/socket/ssl_host_info.h

Index: net/socket/ssl_host_info.h
diff --git a/net/socket/ssl_host_info.h b/net/socket/ssl_host_info.h
index 8f1502bc6368e7714eb7b8970de9a860dbccd129..c384e2e7828b587d5fa19063336babdc25e32ac2 100644
--- a/net/socket/ssl_host_info.h
+++ b/net/socket/ssl_host_info.h
@@ -14,6 +14,7 @@
 #include "net/base/cert_verifier.h"
 #include "net/base/cert_verify_result.h"
 #include "net/base/completion_callback.h"
+#include "net/base/dnsrr_resolver.h"
 #include "net/socket/ssl_client_socket.h"
 
 namespace net {
@@ -56,6 +57,9 @@ class SSLHostInfo {
   // callback.
   virtual void Persist() = 0;
 
+  // StartDnsLookup triggers a DNS lookup for the host.
+  void StartDnsLookup(DnsRRResolver* dnsrr_resolver);
+
   struct State {
     State();
     ~State();
@@ -119,6 +123,10 @@ class SSLHostInfo {
   // ParseInner is a helper function for Parse.
   bool ParseInner(const std::string& data);
 
+  // DnsComplete is a callback function which is called when our DNS resolution
+  // completes.
+  void DnsComplete(int rv);
+
   // This is the hostname that we'll validate the certificates against.
   const std::string hostname_;
   bool cert_parsing_failed_;
@@ -132,6 +140,12 @@ class SSLHostInfo {
   SingleRequestCertVerifier verifier_;
   scoped_refptr<X509Certificate> cert_;
   scoped_refptr<CancelableCompletionCallback<SSLHostInfo> > callback_;
+
+  DnsRRResolver* dnsrr_resolver_;
+  CompletionCallback* dns_callback_;
+  DnsRRResolver::Handle dns_handle_;
+  RRResponse dns_response_;
+  base::TimeTicks dns_lookup_start_time_;
 };
 
 class SSLHostInfoFactory {