Implement automatic load of composed/embedded automation trees

chrome/chrome_browser.gypi

 # Copyright 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': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 1882 matching lines @@
       'browser/media/protected_media_identifier_permission_context.h',
       'browser/media/protected_media_identifier_permission_context_factory.cc',
       'browser/media/protected_media_identifier_permission_context_factory.h',
     ],
     # Used everywhere but Android.
     'chrome_browser_non_android_sources': [
       'browser/accessibility/accessibility_events.cc',
       'browser/accessibility/accessibility_events.h',
       'browser/accessibility/accessibility_extension_api_constants.cc',
       'browser/accessibility/accessibility_extension_api_constants.h',
+      'browser/accessibility/ax_tree_id_registry.cc',
+      'browser/accessibility/ax_tree_id_registry.h',
       'browser/accessibility/invert_bubble_prefs.cc',
       'browser/accessibility/invert_bubble_prefs.h',
       'browser/auto_launch_trial.cc',
       'browser/auto_launch_trial.h',
       'browser/bookmarks/bookmark_html_writer.cc',
       'browser/bookmarks/bookmark_html_writer.h',
       'browser/certificate_viewer.cc',
       'browser/certificate_viewer.h',
       'browser/chrome_browser_main_posix.cc',
       'browser/chrome_browser_main_posix.h',
@@ skipping 1678 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }