[Downloads] Use the initiating StoragePartition for resumption.

content/browser/loader/resource_dispatcher_host_impl.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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 
 #include <stddef.h>
 
@@ skipping 763 matching lines @@
   // Check if the renderer is permitted to request the requested URL.
   if (!ChildProcessSecurityPolicyImpl::GetInstance()->
           CanRequestURL(child_id, url)) {
     DVLOG(1) << "Denied unauthorized download request for "
              << url.possibly_invalid_spec();
     return DOWNLOAD_INTERRUPT_REASON_NETWORK_INVALID_REQUEST;
   }
 
   request_id_--;
 
-  const net::URLRequestContext* request_context = context->GetRequestContext();
+  const net::URLRequestContext* request_context = request->context();
   if (!request_context->job_factory()->IsHandledURL(url)) {
     DVLOG(1) << "Download request for unsupported protocol: "
              << url.possibly_invalid_spec();
     return DOWNLOAD_INTERRUPT_REASON_NETWORK_INVALID_REQUEST;
   }
 
   ResourceRequestInfoImpl* extra_info =
       CreateRequestInfo(child_id, render_view_route_id,
                         render_frame_route_id, true, context);
   extra_info->set_do_not_prompt_for_login(do_not_prompt_for_login);
@@ skipping 1893 matching lines @@
   ssl.cert_id = GetCertStore()->StoreCert(ssl_info.cert.get(), child_id);
   response->head.security_info = SerializeSecurityInfo(ssl);
 }
 
 CertStore* ResourceDispatcherHostImpl::GetCertStore() {
   return cert_store_for_testing_ ? cert_store_for_testing_
                                  : CertStore::GetInstance();
 }
 
 }  // namespace content