Fix crash when TTS utterances are queued on shutdown.

chrome/chrome_tests.gypi

 # 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.
 {
   'variables' : {
     # Variables for js2gtest rules
     'gypv8sh': '../tools/gypv8sh.py',
     'js2gtest': 'test/base/js2gtest.js',
     'mock_js': 'third_party/mock4js/mock4js.js',
     'test_api_js': 'test/data/webui/test_api.js',
@@ skipping 1325 matching lines @@
         'browser/extensions/extension_menu_manager_unittest.cc',
         'browser/extensions/extension_omnibox_unittest.cc',
         'browser/extensions/extension_pref_value_map_unittest.cc',
         'browser/extensions/extension_prefs_unittest.cc',
         'browser/extensions/extension_process_manager_unittest.cc',
         'browser/extensions/extension_proxy_api_helpers_unittest.cc',
         'browser/extensions/extension_service_unittest.cc',
         'browser/extensions/extension_service_unittest.h',
         'browser/extensions/extension_special_storage_policy_unittest.cc',
         'browser/extensions/extension_sync_data_unittest.cc',
+        'browser/extensions/extension_tts_api_controller_unittest.cc',
         'browser/extensions/extension_ui_unittest.cc',
         'browser/extensions/extension_updater_unittest.cc',
         'browser/extensions/extension_warning_set_unittest.cc',
         'browser/extensions/extension_webnavigation_unittest.cc',
         'browser/extensions/extension_webrequest_api_unittest.cc',
         'browser/extensions/extension_webrequest_time_tracker_unittest.cc',
         'browser/extensions/extensions_quota_service_unittest.cc',
         'browser/extensions/external_policy_extension_loader_unittest.cc',
         'browser/extensions/file_reader_unittest.cc',
         'browser/extensions/image_loading_tracker_unittest.cc',
@@ skipping 2896 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }