Make original_response_headers parameter of NetworkDelegate::OnHeadersReceived const

net/base/network_delegate.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/base/network_delegate.h"
 
 #include "base/logging.h"
 #include "net/base/load_flags.h"
 #include "net/url_request/url_request.h"
 
@@ skipping 19 matching lines @@
 
 void NetworkDelegate::NotifySendHeaders(URLRequest* request,
                                         const HttpRequestHeaders& headers) {
   DCHECK(CalledOnValidThread());
   OnSendHeaders(request, headers);
 }
 
 int NetworkDelegate::NotifyHeadersReceived(
     URLRequest* request,
     const CompletionCallback& callback,
-    HttpResponseHeaders* original_response_headers,
+    const HttpResponseHeaders* original_response_headers,
     scoped_refptr<HttpResponseHeaders>* override_response_headers) {
   DCHECK(CalledOnValidThread());
   DCHECK(original_response_headers);
   DCHECK(!callback.is_null());
   return OnHeadersReceived(request, callback, original_response_headers,
                            override_response_headers);
 }
 
 void NetworkDelegate::NotifyResponseStarted(URLRequest* request) {
   DCHECK(CalledOnValidThread());
@@ skipping 76 matching lines @@
   return OnBeforeSocketStreamConnect(socket, callback);
 }
 
 void NetworkDelegate::NotifyRequestWaitStateChange(const URLRequest& request,
                                                    RequestWaitState state) {
   DCHECK(CalledOnValidThread());
   OnRequestWaitStateChange(request, state);
 }
 
 }  // namespace net