Support focus highlight in Android window

components/arc/BUILD.gn

 # Copyright 2015 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("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 
 static_library("arc") {
   sources = [
     "arc_service_manager.cc",
@@ skipping 107 matching lines @@
     "//mojo/edk/system",
   ]
 
   public_deps = [
     ":arc_bindings",
   ]
 }
 
 mojom("arc_bindings") {
   sources = [
+    "common/accessibility_helper.mojom",
     "common/app.mojom",
     "common/arc_bridge.mojom",
     "common/audio.mojom",
     "common/auth.mojom",
     "common/bitmap.mojom",
     "common/bluetooth.mojom",
     "common/boot_phase_monitor.mojom",
     "common/clipboard.mojom",
     "common/crash_collector.mojom",
     "common/enterprise_reporting.mojom",
@@ skipping 80 matching lines @@
     "//testing/gtest",
     "//ui/aura",
     "//ui/aura:test_support",
     "//ui/base:test_support",
     "//ui/base/ime",
     "//ui/events",
     "//ui/events:dom_keycode_converter",
     "//url:url",
   ]
 }