Add comments about --config-vars that need to be in sync.

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 43 matching lines @@
       'action': [
         'python',
         '<(DEPTH)/tools/isolate_driver.py',
         '<(test_isolation_mode)',
         '--isolated', '<(PRODUCT_DIR)/<(RULE_INPUT_ROOT).isolated',
         '--isolate', '<(RULE_INPUT_PATH)',
 
         # Variables should use the -V FOO=<(FOO) form so frequent values,
         # like '0' or '1', aren't stripped out by GYP. Run 'isolate.py help' for
         # more details.
-        #
-        # This list needs to be kept in sync with the cmd line options
-        # in src/build/android/pylib/gtest/setup.py.
 
         # Path variables are used to replace file paths when loading a .isolate
         # file
         '--path-variable', 'DEPTH', '<(DEPTH)',
         '--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)',
 
+        # Note: This list must match DefaultConfigVariables()
+        # in build/android/pylib/utils/isolator.py
         '--config-variable', 'CONFIGURATION_NAME=<(CONFIGURATION_NAME)',
         '--config-variable', 'OS=<(OS)',
         '--config-variable', 'asan=<(asan)',
         '--config-variable', 'chromeos=<(chromeos)',
         '--config-variable', 'component=<(component)',
         '--config-variable', 'disable_nacl=<(disable_nacl)',
         '--config-variable', 'enable_plugins=<(enable_plugins)',
         '--config-variable', 'fastbuild=<(fastbuild)',
         '--config-variable', 'icu_use_data_file_flag=<(icu_use_data_file_flag)',
         # TODO(kbr): move this to chrome_tests.gypi:gles2_conform_tests_run
@@ skipping 32 matching lines @@
           ],
         }, {
           'outputs': [
             '<(PRODUCT_DIR)/<(RULE_INPUT_ROOT).isolated',
           ],
         }],
       ],
     },
   ],
 }