First step to remove SingleRequestHostResolver.

net/ftp/ftp_network_transaction.cc

Index: net/ftp/ftp_network_transaction.cc
diff --git a/net/ftp/ftp_network_transaction.cc b/net/ftp/ftp_network_transaction.cc
index 32cd5d404556a89d143fbee1bcc4fcc533771158..fc07668b0a12bf5bd17fb796af97d1c129286c4b 100644
--- a/net/ftp/ftp_network_transaction.cc
+++ b/net/ftp/ftp_network_transaction.cc
@@ -637,12 +637,10 @@ int FtpNetworkTransaction::DoCtrlResolveHost() {
 
   HostResolver::RequestInfo info(HostPortPair::FromURL(request_->url));
   // No known referrer.
-  return resolver_.Resolve(
-      info,
-      DEFAULT_PRIORITY,
-      &addresses_,
+  return resolver_->Resolve(
+      info, DEFAULT_PRIORITY, &addresses_,
       base::Bind(&FtpNetworkTransaction::OnIOComplete, base::Unretained(this)),
-      net_log_);
+      &resolve_request_, net_log_);
 }
 
 int FtpNetworkTransaction::DoCtrlResolveHostComplete(int result) {