Only include chromevox_test_data in isolated swarming tests for chromeos builds.

build/isolate.gypi

 # 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.
 
 # This file is meant to be included into a target to provide a rule
 # to "build" .isolate files into a .isolated file.
 #
 # To use this, create a gyp target with the following form:
 # 'conditions': [
 #   ['test_isolation_mode != "noop"', {
@@ skipping 70 matching lines @@
 
         # Path variables are used to replace file paths when loading a .isolate
         # file
         '--path-variable', 'PRODUCT_DIR', '<(PRODUCT_DIR) ',
 
         # Extra variables are replaced on the 'command' entry and on paths in
         # the .isolate file but are not considered relative paths.
         '--extra-variable', 'version_full=<(version_full)',
 
         '--config-variable', 'OS=<(OS)',
+        '--config-variable', 'chromeos=<(chromeos)',
         '--config-variable', 'component=<(component)',
         # TODO(kbr): move this to chrome_tests.gypi:gles2_conform_tests_run
         # once support for user-defined config variables is added.
         '--config-variable',
           'internal_gles2_conform_tests=<(internal_gles2_conform_tests)',
         '--config-variable', 'icu_use_data_file_flag=<(icu_use_data_file_flag)',
         '--config-variable', 'use_openssl=<(use_openssl)',
       ],
       'conditions': [
         # Note: When gyp merges lists, it appends them to the old value.
@@ skipping 16 matching lines @@
           'action': [ '--outdir', '<(test_isolation_outdir)' ],
         }],
         ['test_isolation_fail_on_missing == 0', {
             'action': ['--ignore_broken_items'],
           },
         ],
       ],
     },
   ],
 }