Fixes the cache lock issue.

net/url_request/url_request_ftp_job.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/url_request/url_request_ftp_job.h"
 
 #include "base/compiler_specific.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 116 matching lines @@
 }
 
 void URLRequestFtpJob::Kill() {
   if (pac_request_) {
     proxy_service_->CancelPacRequest(pac_request_);
     pac_request_ = nullptr;
   }
   if (ftp_transaction_)
     ftp_transaction_.reset();
   if (http_transaction_)
-    http_transaction_.reset();
+    http_transaction_->Orphan(std::move(http_transaction_));
   URLRequestJob::Kill();
   weak_factory_.InvalidateWeakPtrs();
 }
 
 void URLRequestFtpJob::OnResolveProxyComplete(int result) {
   pac_request_ = NULL;
 
   if (result != OK) {
     OnStartCompletedAsync(result);
     return;
@@ skipping 234 matching lines @@
   if (cached_auth) {
     // Retry using cached auth data.
     SetAuth(cached_auth->credentials);
   } else {
     // Prompt for a username/password.
     NotifyHeadersComplete();
   }
 }
 
 }  // namespace net