Adding Null check in onAuthRequired() for handling FTP requests

extensions/browser/api/web_request/web_request_api.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 "extensions/browser/api/web_request/web_request_api.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 979 matching lines @@
   dict->SetBoolean(keys::kIsProxyKey, auth_info.is_proxy);
   if (!auth_info.scheme.empty())
     dict->SetString(keys::kSchemeKey, auth_info.scheme);
   if (!auth_info.realm.empty())
     dict->SetString(keys::kRealmKey, auth_info.realm);
   base::DictionaryValue* challenger = new base::DictionaryValue();
   challenger->SetString(keys::kHostKey, auth_info.challenger.host());
   challenger->SetInteger(keys::kPortKey, auth_info.challenger.port());
   dict->Set(keys::kChallengerKey, challenger);
   dict->Set(keys::kStatusLineKey, GetStatusLine(request->response_headers()));
-  dict->SetInteger(keys::kStatusCodeKey,
+  if (request->response_headers())
+    dict->SetInteger(keys::kStatusCodeKey,
       request->response_headers()->response_code());

[not at google - send to devlin, 2015/08/19 14:43:25]

Make sure to run "git cl format" before submitting this CL.

[shiva.jm, 2015/08/20 04:07:37]

Done.

   if (extra_info_spec & ExtraInfoSpec::RESPONSE_HEADERS) {
     dict->Set(keys::kResponseHeadersKey,
               GetResponseHeadersList(request->response_headers()));
   }
   args.Append(dict);
 
   if (DispatchEvent(browser_context, request, listeners, args)) {
     blocked_requests_[request->identifier()].event = kOnAuthRequired;
     blocked_requests_[request->identifier()].is_incognito |=
         IsIncognitoBrowserContext(browser_context);
@@ skipping 1484 matching lines @@
   // Continue gracefully.
   RunSync();
 }
 
 bool WebRequestHandlerBehaviorChangedFunction::RunSync() {
   helpers::ClearCacheOnNavigation();
   return true;
 }
 
 }  // namespace extensions