Add new interactive ui test of spoken feedback.

chrome/chrome_tests.gypi

 # Copyright 2013 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' : {
     'chromedriver_unittest_sources': [
       'test/chromedriver/capabilities_unittest.cc',
       'test/chromedriver/chrome/chrome_finder_unittest.cc',
       'test/chromedriver/chrome/console_logger_unittest.cc',
       'test/chromedriver/chrome/device_manager_unittest.cc',
@@ skipping 389 matching lines @@
         ['use_aura==0 or chromeos==1', {
           'sources!': [
             '../ui/views/corewm/desktop_capture_controller_unittest.cc',
           ],
         }],
         ['chromeos==1', {
           'dependencies': [
             '../chromeos/chromeos.gyp:chromeos',
           ],
           'sources': [
+            'browser/chromeos/accessibility/spoken_feedback_browsertest.cc',
             'browser/chromeos/accessibility/sticky_keys_browsertest.cc',
             'browser/chromeos/input_method/textinput_browsertest.cc',
             'browser/chromeos/input_method/textinput_surroundingtext_browsertest.cc',
             'browser/chromeos/input_method/textinput_test_helper.cc',
             'browser/chromeos/input_method/textinput_test_helper.h',
             'browser/chromeos/login/captive_portal_window_browsertest.cc',
             'browser/chromeos/login/eula_browsertest.cc',
             'browser/chromeos/login/login_browsertest.cc',
             'browser/chromeos/login/login_manager_test.cc',
             'browser/chromeos/login/login_manager_test.h',
@@ skipping 2738 matching lines @@
             'utility',
           ],
           'sources': [
             'tools/service_discovery_sniffer/service_discovery_sniffer.h',
             'tools/service_discovery_sniffer/service_discovery_sniffer.cc',
           ],
         }]
     }],
   ],  # 'conditions'
 }