Add a button on status bar to indicate that accessibility is enabled.

chrome/chrome_browser.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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'dependencies': [
@@ skipping 693 matching lines @@
         'browser/chromeos/proxy_cros_settings_provider.cc',
         'browser/chromeos/proxy_cros_settings_provider.h',
         'browser/chromeos/setting_level_bubble.cc',
         'browser/chromeos/setting_level_bubble.h',
         'browser/chromeos/setting_level_bubble_view.cc',
         'browser/chromeos/setting_level_bubble_view.h',
         'browser/chromeos/sim_dialog_delegate.cc',
         'browser/chromeos/sim_dialog_delegate.h',
         'browser/chromeos/sms_observer.cc',
         'browser/chromeos/sms_observer.h',
+        'browser/chromeos/status/accessibility_menu_button.cc',
+        'browser/chromeos/status/accessibility_menu_button.h',
         'browser/chromeos/status/caps_lock_menu_button.cc',
         'browser/chromeos/status/caps_lock_menu_button.h',
         'browser/chromeos/status/clock_menu_button.cc',
         'browser/chromeos/status/clock_menu_button.h',
         'browser/chromeos/status/input_method_menu.cc',
         'browser/chromeos/status/input_method_menu.h',
         'browser/chromeos/status/input_method_menu_button.cc',
         'browser/chromeos/status/input_method_menu_button.h',
         'browser/chromeos/status/memory_menu_button.cc',
         'browser/chromeos/status/memory_menu_button.h',
@@ skipping 4165 matching lines @@
               # weak imports in dependents, who still must #include
               # closure_blocks_leopard_compat.h to get weak imports.
               'type': 'none',
             }],
           ],
         },
       ],
     }],
   ],
 }