Rewrite renderer accessibility to not use WebAccessibilityCache.

content/content_renderer.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.
 
 {
   'dependencies': [
     '../jingle/jingle.gyp:jingle_glue',
     '../net/net.gyp:net',
     '../ppapi/ppapi_internal.gyp:ppapi_proxy',
     '../skia/skia.gyp:skia',
@@ skipping 103 matching lines @@
     'renderer/render_view_observer_tracker.h',
     'renderer/render_view_selection.cc',
     'renderer/render_view_selection.h',
     'renderer/render_view_visitor.h',
     'renderer/render_widget.cc',
     'renderer/render_widget.h',
     'renderer/render_widget_fullscreen.cc',
     'renderer/render_widget_fullscreen.h',
     'renderer/render_widget_fullscreen_pepper.cc',
     'renderer/render_widget_fullscreen_pepper.h',
+    'renderer/renderer_accessibility.cc',
+    'renderer/renderer_accessibility.h',
     'renderer/renderer_glue.cc',
     'renderer/renderer_main.cc',
     'renderer/renderer_main_platform_delegate.h',
     'renderer/renderer_main_platform_delegate_linux.cc',
     'renderer/renderer_main_platform_delegate_mac.mm',
     'renderer/renderer_main_platform_delegate_win.cc',
     'renderer/renderer_webapplicationcachehost_impl.cc',
     'renderer/renderer_webapplicationcachehost_impl.h',
     'renderer/renderer_webaudiodevice_impl.cc',
     'renderer/renderer_webaudiodevice_impl.h',
@@ skipping 102 matching lines @@
       ],
       'sources': [
         'renderer/media/video_capture_module_impl.cc',
         'renderer/media/video_capture_module_impl.h',
         'renderer/media/webrtc_audio_device_impl.cc',
         'renderer/media/webrtc_audio_device_impl.h',
       ],
     }],
   ],
 }