Update Native Client Authors to be Chromium Authors for the code moved from the

ppapi/native_client/tests/ppapi_test_lib/internal_utils.cc

-// Copyright (c) 2011 The Native Client Authors. All rights reserved.
+// 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 "native_client/tests/ppapi_test_lib/internal_utils.h"
 
 namespace {
 
 PP_Module global_pp_module = 0;
 PP_Instance global_pp_instance = 0;
 PPB_GetInterface global_ppb_get_interface = NULL;
 
 }  // namespace
 
 void set_ppb_get_interface(PPB_GetInterface get_interface) {
   global_ppb_get_interface = get_interface;
 }
 void set_pp_instance(PP_Instance instance) { global_pp_instance = instance; }
 void set_pp_module(PP_Module module) { global_pp_module = module; }
 PPB_GetInterface ppb_get_interface() { return global_ppb_get_interface; }
 PP_Module pp_module() { return global_pp_module; }
 PP_Instance pp_instance() { return global_pp_instance; }