Hook up guest browser plugins to the accessibility tree.

content/content_browser.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_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
     '../net/net.gyp:net',
@@ skipping 563 matching lines @@
       'browser/fileapi/fileapi_message_filter.h',
       'browser/fileapi/upload_file_system_file_element_reader.cc',
       'browser/fileapi/upload_file_system_file_element_reader.h',
       'browser/font_list_async.cc',
       'browser/frame_host/cross_process_frame_connector.cc',
       'browser/frame_host/cross_process_frame_connector.h',
       'browser/frame_host/cross_site_transferring_request.cc',
       'browser/frame_host/cross_site_transferring_request.h',
       'browser/frame_host/debug_urls.cc',
       'browser/frame_host/debug_urls.h',
+      'browser/frame_host/frame_accessibility.cc',
+      'browser/frame_host/frame_accessibility.h',
       'browser/frame_host/frame_tree.cc',
       'browser/frame_host/frame_tree.h',
       'browser/frame_host/frame_tree_node.cc',
       'browser/frame_host/frame_tree_node.h',
       'browser/frame_host/interstitial_page_impl.cc',
       'browser/frame_host/interstitial_page_impl.h',
       'browser/frame_host/interstitial_page_navigator_impl.cc',
       'browser/frame_host/interstitial_page_navigator_impl.h',
       'browser/frame_host/navigation_before_commit_info.cc',
       'browser/frame_host/navigation_before_commit_info.h',
@@ skipping 1281 matching lines @@
       'sources': [
         'browser/media/cdm/browser_cdm_manager.cc',
         'browser/media/cdm/browser_cdm_manager.h',
         # This works on Android because enable_browser_cdms==1 on Android.
         'browser/media/media_web_contents_observer.cc',
         'browser/media/media_web_contents_observer.h',
       ],
     }],
   ],
 }