Make original_response_headers parameter of NetworkDelegate::OnHeadersReceived const

net/url_request/url_request_test_util.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_test_util.h"
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/threading/thread.h"
@@ skipping 332 matching lines @@
   EXPECT_TRUE(next_states_[req_id] & kStageSendHeaders) <<
       event_order_[req_id];
   next_states_[req_id] =
       kStageHeadersReceived |
       kStageCompletedError;
 }
 
 int TestNetworkDelegate::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) {
   int req_id = request->identifier();
   event_order_[req_id] += "OnHeadersReceived\n";
   InitRequestStatesIfNew(req_id);
   EXPECT_TRUE(next_states_[req_id] & kStageHeadersReceived) <<
       event_order_[req_id];
   next_states_[req_id] =
       kStageBeforeRedirect |
       kStageResponseStarted |
       kStageAuthRequired |
@@ skipping 186 matching lines @@
 
 net::URLRequestJob* TestJobInterceptor::MaybeInterceptResponse(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate) const {
   return NULL;
 }
 
 void TestJobInterceptor::set_main_intercept_job(net::URLRequestJob* job) {
   main_intercept_job_ = job;
 }