Add a mechanism to ignore certain elements for accessibility audit on a per-test basis.

chrome/chrome_tests.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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 1343 matching lines @@
       ],
       'rules': [
         {
           'rule_name': 'js2webui',
           'extension': 'js',
           'msvs_external_rule': 1,
           'inputs': [
             '<(gypv8sh)',
             '<(PRODUCT_DIR)/v8_shell<(EXECUTABLE_SUFFIX)',
             '<(mock_js)',
+            '<(accessibility_audit_js)',
             '<(test_api_js)',
             '<(js2gtest)',
           ],
           'outputs': [
             '<(INTERMEDIATE_DIR)/chrome/<(RULE_INPUT_DIRNAME)/<(RULE_INPUT_ROOT)-gen.cc',
             '<(PRODUCT_DIR)/test_data/chrome/<(RULE_INPUT_DIRNAME)/<(RULE_INPUT_ROOT).js',
           ],
           'process_outputs_as_sources': 1,
           'action': [
             'python',
@@ skipping 331 matching lines @@
       ],
       'rules': [
         {
           'rule_name': 'js2webui',
           'extension': 'js',
           'msvs_external_rule': 1,
           'inputs': [
             '<(gypv8sh)',
             '<(PRODUCT_DIR)/v8_shell<(EXECUTABLE_SUFFIX)',
             '<(mock_js)',
+            '<(accessibility_audit_js)',
             '<(test_api_js)',
             '<(js2gtest)',
           ],
           'outputs': [
             '<(INTERMEDIATE_DIR)/chrome/<(RULE_INPUT_DIRNAME)/<(RULE_INPUT_ROOT)-gen.cc',
             '<(PRODUCT_DIR)/test_data/chrome/<(RULE_INPUT_DIRNAME)/<(RULE_INPUT_ROOT).js',
           ],
           'process_outputs_as_sources': 1,
           'action': [
             'python',
@@ skipping 1156 matching lines @@
             'sync_integration_tests.isolate',
           ],
           'sources': [
             'sync_integration_tests.isolate',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }