Change URLRequest to use a ref-counted buffer for actual IO....

chrome/browser/renderer_host/resource_dispatcher_host.cc

 // Copyright (c) 2006-2008 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 <vector>
 
 #include "chrome/browser/renderer_host/resource_dispatcher_host.h"
 
@@ skipping 910 matching lines @@
   if (info->has_started_reading)
     OnReadCompleted(i->second, info->paused_read_bytes);
   else
     OnResponseStarted(i->second);
 }
 
 bool ResourceDispatcherHost::Read(URLRequest* request, int* bytes_read) {
   ExtraRequestInfo* info = ExtraInfoForRequest(request);
   DCHECK(!info->is_paused);
 
-  char* buf;
+  net::IOBuffer* buf;
   int buf_size;
   if (!info->resource_handler->OnWillRead(info->request_id,
                                           &buf, &buf_size, -1)) {
     return false;
   }
 
   DCHECK(buf);
   DCHECK(buf_size > 0);
 
   info->has_started_reading = true;
@@ skipping 369 matching lines @@
   for (BlockedRequestsList::iterator req_iter = requests->begin();
        req_iter != requests->end(); ++req_iter) {
     if (cancel_requests)
       delete req_iter->url_request;
     else
       BeginRequestInternal(req_iter->url_request, req_iter->mixed_content);
   }
 
   delete requests;
 }