[ABANDONED] Make sure that threaded-data-provider doesn't cause a use-after-free.

content/child/resource_dispatcher.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/child/resource_dispatcher.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 235 matching lines @@
       // call peer's callback.
       if (request_info->blocked_response && !alternative_data.empty()) {
         data_ptr = alternative_data.data();
         data_length = alternative_data.size();
         encoded_data_length = alternative_data.size();
       }
     }
 
     if (!request_info->blocked_response || !alternative_data.empty()) {
       if (request_info->threaded_data_provider) {
+        DCHECK(alternative_data.empty());
         request_info->threaded_data_provider->OnReceivedDataOnForegroundThread(
             data_ptr, data_length, encoded_data_length);
         // A threaded data provider will take care of its own ACKing, as the
         // data may be processed later on another thread.
         send_ack = false;
       } else {
         request_info->peer->OnReceivedData(
             data_ptr, data_length, encoded_data_length);
       }
     }
@@ skipping 529 matching lines @@
       extra_data->transferred_request_request_id();
   request->service_worker_provider_id =
       extra_data->service_worker_provider_id();
   request->request_body = request_body;
   if (frame_origin)
     *frame_origin = extra_data->frame_origin();
   return request.Pass();
 }
 
 }  // namespace content