Don't pass GSS_C_NO_CONTEXT into gss_inquire_context()

net/http/http_auth_gssapi_posix.cc

 // Copyright (c) 2011 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_gssapi_posix.h"
 
 #include <limits>
 #include <string>
 
 #include "base/base64.h"
@@ skipping 328 matching lines @@
                             const gss_ctx_id_t context_handle) {
   OM_uint32 major_status = 0;
   OM_uint32 minor_status = 0;
   gss_name_t src_name = GSS_C_NO_NAME;
   gss_name_t targ_name = GSS_C_NO_NAME;
   OM_uint32 lifetime_rec = 0;
   gss_OID mech_type = GSS_C_NO_OID;
   OM_uint32 ctx_flags = 0;
   int locally_initiated = 0;
   int open = 0;
+  if (context_handle == GSS_C_NO_CONTEXT)
+    return std::string("Context: GSS_C_NO_CONTEXT");
   major_status = gssapi_lib->inquire_context(&minor_status,
                                              context_handle,
                                              &src_name,
                                              &targ_name,
                                              &lifetime_rec,
                                              &mech_type,
                                              &ctx_flags,
                                              &locally_initiated,
                                              &open);
   ScopedName(src_name, gssapi_lib);
@@ skipping 536 matching lines @@
   if (rv != OK) {
     LOG(ERROR) << "Problem initializing context. \n"
                << DisplayExtendedStatus(library_, major_status, minor_status)
                << '\n'
                << DescribeContext(library_, scoped_sec_context_.get());
   }
   return rv;
 }
 
 }  // namespace net