[MacViews] Fix AccessiblePaneViewTest.SetPaneFocusAndRestore.

ui/base/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/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
@@ skipping 553 matching lines @@
   }
 }
 
 source_set("test_support") {
   testonly = true
   sources = [
     "test/material_design_controller_test_api.cc",
     "test/material_design_controller_test_api.h",
     "test/nswindow_fullscreen_notification_waiter.h",
     "test/nswindow_fullscreen_notification_waiter.mm",
+    "test/scoped_fake_nswindow_focus.h",
+    "test/scoped_fake_nswindow_focus.mm",
     "test/scoped_fake_nswindow_fullscreen.h",
     "test/scoped_fake_nswindow_fullscreen.mm",
     "test/test_clipboard.cc",
     "test/test_clipboard.h",
     "test/ui_controls.h",
     "test/ui_controls_aura.cc",
     "test/ui_controls_internal_win.cc",
     "test/ui_controls_internal_win.h",
     "test/ui_controls_mac.mm",
     "test/ui_controls_win.cc",
@@ skipping 269 matching lines @@
   }
   if (is_mac) {
     data += [ "$root_out_dir/ui_unittests Framework.framework/" ]
 
     if (is_asan && symbol_level == 0) {
       data += [ "$root_out_dir/ui_base_unittests.dSYM/" ]
     }
   }
 }
 # TODO(GYP) Mac (ui_base_tests_bundle)