Add AUTHORS and LICENSE files, and copyright headers to relevant source files...

trunk/test/variables/commands.gypi

+# Copyright (c) 2009 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
 # This file is included from commands.gyp to test evaluation order of includes.
 {
   'variables': {
     'included_variable': 'XYZ',
   },
   'targets': [
     {
       'target_name': 'dummy',
       'type': 'none',
     },
   ],
 }