Allow dynamic updating of authentication policies

net/http/http_auth_handler_negotiate.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/http/http_auth_handler_negotiate.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
@@ skipping 43 matching lines @@
     if (rv != OK)
       return rv;
   }
   // TODO(cbentzel): Move towards model of parsing in the factory
   //                 method and only constructing when valid.
   scoped_ptr<HttpAuthHandler> tmp_handler(
       new HttpAuthHandlerNegotiate(auth_library_.get(), max_token_length_,
                                    url_security_manager(), resolver_,
                                    disable_cname_lookup_, use_port_));
 #elif defined(OS_ANDROID)
-  if (is_unsupported_ || auth_library_->empty() || reason == CREATE_PREEMPTIVE)
+  if (is_unsupported_ || !auth_library_ || auth_library_->empty() ||
+      reason == CREATE_PREEMPTIVE)
     return ERR_UNSUPPORTED_AUTH_SCHEME;
   // TODO(cbentzel): Move towards model of parsing in the factory
   //                 method and only constructing when valid.
   scoped_ptr<HttpAuthHandler> tmp_handler(new HttpAuthHandlerNegotiate(
       auth_library_.get(), url_security_manager(), resolver_,
       disable_cname_lookup_, use_port_));
 #elif defined(OS_POSIX)
   if (is_unsupported_)
     return ERR_UNSUPPORTED_AUTH_SCHEME;
   if (!auth_library_->Init()) {
@@ skipping 260 matching lines @@
 bool HttpAuthHandlerNegotiate::CanDelegate() const {
   // TODO(cbentzel): Should delegation be allowed on proxies?
   if (target_ == HttpAuth::AUTH_PROXY)
     return false;
   if (!url_security_manager_)
     return false;
   return url_security_manager_->CanDelegate(origin_);
 }
 
 }  // namespace net