Make original_response_headers parameter of NetworkDelegate::OnHeadersReceived const

net/url_request/url_request_test_util.h

 // 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.
 
 #ifndef NET_URL_REQUEST_URL_REQUEST_TEST_UTIL_H_
 #define NET_URL_REQUEST_URL_REQUEST_TEST_UTIL_H_
 
 #include <stdlib.h>
 
 #include <map>
@@ skipping 199 matching lines @@
                                  const net::CompletionCallback& callback,
                                  GURL* new_url) OVERRIDE;
   virtual int OnBeforeSendHeaders(net::URLRequest* request,
                                   const net::CompletionCallback& callback,
                                   net::HttpRequestHeaders* headers) OVERRIDE;
   virtual void OnSendHeaders(net::URLRequest* request,
                              const net::HttpRequestHeaders& headers) OVERRIDE;
   virtual int OnHeadersReceived(
       net::URLRequest* request,
       const net::CompletionCallback& callback,
-      net::HttpResponseHeaders* original_response_headers,
+      const net::HttpResponseHeaders* original_response_headers,
       scoped_refptr<net::HttpResponseHeaders>* override_response_headers)
       OVERRIDE;
   virtual void OnBeforeRedirect(net::URLRequest* request,
                                 const GURL& new_location) OVERRIDE;
   virtual void OnResponseStarted(net::URLRequest* request) OVERRIDE;
   virtual void OnRawBytesRead(const net::URLRequest& request,
                               int bytes_read) OVERRIDE;
   virtual void OnCompleted(net::URLRequest* request, bool started) OVERRIDE;
   virtual void OnURLRequestDestroyed(net::URLRequest* request) OVERRIDE;
   virtual void OnPACScriptError(int line_number,
@@ skipping 83 matching lines @@
   virtual net::URLRequestJob* MaybeInterceptResponse(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate) const OVERRIDE;
   void set_main_intercept_job(net::URLRequestJob* job);
 
  private:
   mutable net::URLRequestJob* main_intercept_job_;
 };
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_TEST_UTIL_H_