First step to move common accessibility code out of content.

content/content_common.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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../net/net.gyp:net',
     '../skia/skia.gyp:skia',
     '../third_party/icu/icu.gyp:icuuc',
     '../ui/gfx/gfx.gyp:gfx',
     '../ui/shell_dialogs/shell_dialogs.gyp:shell_dialogs',
     '../ui/ui.gyp:ui',
     '../url/url.gyp:url_lib',
     '../webkit/common/user_agent/webkit_user_agent.gyp:user_agent',
   ],
   'include_dirs': [
     '..',
   ],
   'export_dependent_settings': [
     '../base/base.gyp:base',
   ],
   'sources': [
+    'public/common/ax_node.cc',
+    'public/common/ax_node.h',
+    'public/common/ax_node_data.cc',
+    'public/common/ax_node_data.h',
+    'public/common/ax_tree.cc',
+    'public/common/ax_tree.h',
+    'public/common/ax_tree_update.cc',
+    'public/common/ax_tree_update.h',
     'public/common/bindings_policy.h',
     'public/common/child_process_host.h',
     'public/common/child_process_host_delegate.cc',
     'public/common/child_process_host_delegate.h',
     'public/common/child_process_sandbox_support_linux.h',
     'public/common/content_constants.cc',
     'public/common/content_constants.h',
     'public/common/content_descriptors.h',
     'public/common/content_ipc_logging.h',
     'public/common/content_paths.h',
@@ skipping 79 matching lines @@
     'common/android/common_jni_registrar.h',
     'common/android/device_telephony_info.cc',
     'common/android/device_telephony_info.h',
     'common/android/hash_set.cc',
     'common/android/hash_set.h',
     'common/android/surface_texture_peer.cc',
     'common/android/surface_texture_peer.h',
     'common/android/trace_event_binding.cc',
     'common/android/trace_event_binding.h',
     'common/appcache_messages.h',
+    'common/ax_node_impl.cc',
+    'common/ax_node_impl.h',
+    'common/ax_tree_impl.cc',
+    'common/ax_tree_impl.h',
+    'common/ax_tree_serializer.cc',
+    'common/ax_tree_serializer.h',
+    'common/ax_tree_source.h',
     'common/browser_plugin/browser_plugin_constants.cc',
     'common/browser_plugin/browser_plugin_constants.h',
     'common/browser_plugin/browser_plugin_messages.h',
     'common/browser_rendering_stats.cc',
     'common/browser_rendering_stats.h',
     'common/cc_messages.cc',
     'common/cc_messages.h',
     'common/child_process_host_impl.cc',
     'common/child_process_host_impl.h',
     'common/child_process_messages.h',
@@ skipping 451 matching lines @@
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
         'msvs_cygwin_shell': 1,
       },
      ]
     }],
   ],
 }