MacViews a11y: Sync VoiceOver cursor with keyboard focus.

ui/accessibility/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/linux/pkg_config.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/json_schema_api.gni")
 import("//testing/test.gni")
 if (is_android) {
@@ skipping 23 matching lines @@
       # G_DEFINE_TYPE automatically generates a *get_instance_private
       # inline function after glib 2.37. That's unused. Prevent to
       # complain about it.
       "-Wno-unused-function",
     ]
   }
 }
 
 component("accessibility") {
   sources = [
+    "../../tmp-traceclass.h",
+    "../../tmp-traceclass.mm",
     "ax_node.cc",
     "ax_node.h",
     "ax_node_data.cc",
     "ax_node_data.h",
     "ax_serializable_tree.cc",
     "ax_serializable_tree.h",
     "ax_text_utils.cc",
     "ax_text_utils.h",
     "ax_tree.cc",
     "ax_tree.h",
@@ skipping 121 matching lines @@
 json_schema_api("ax_gen") {
   sources = [
     "ax_enums.idl",
   ]
   deps = [
     "//base/third_party/dynamic_annotations",
   ]
   root_namespace = "ui"
   schemas = true
 }