Make original_response_headers parameter of NetworkDelegate::OnHeadersReceived const

net/url_request/url_request_context_builder.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_context_builder.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 38 matching lines @@
                                   HttpRequestHeaders* headers) OVERRIDE {
     return OK;
   }
 
   virtual void OnSendHeaders(URLRequest* request,
                              const HttpRequestHeaders& headers) OVERRIDE {}
 
   virtual int OnHeadersReceived(
       URLRequest* request,
       const CompletionCallback& callback,
-      HttpResponseHeaders* original_response_headers,
+      const HttpResponseHeaders* original_response_headers,
       scoped_refptr<HttpResponseHeaders>* override_response_headers)
       OVERRIDE {
     return OK;
   }
 
   virtual void OnBeforeRedirect(URLRequest* request,
                                 const GURL& new_location) OVERRIDE {}
 
   virtual void OnResponseStarted(URLRequest* request) OVERRIDE {}
 
@@ skipping 232 matching lines @@
     http_transaction_factory = new HttpNetworkLayer(network_session);
   }
   storage->set_http_transaction_factory(http_transaction_factory);
 
   // TODO(willchan): Support sdch.
 
   return context;
 }
 
 }  // namespace net