Add tests for braille commands.

chrome/browser/resources/chromeos/chromevox/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("//build/config/features.gni")
 import("//testing/test.gni")
 import("//chrome/test/base/js2gtest.gni")
 import("chromevox.gni")
 
 assert(is_chromeos)
@@ skipping 359 matching lines @@
     rebase_path("$root_out_dir/test_data", root_build_dir) + ":",
   ]
   deps = [
     ":chromevox_test_messages_js",
   ]
 }
 
 js2gtest("chromevox_unitjs_tests") {
   test_type = "webui"
   sources = chromevox_tests_gypi_values.chromevox_tests_unitjs_sources
+  extra_gen_files =
+      chromevox_tests_gypi_values.chromevox_tests_unit_extra_js_sources
   test_deps_js_outputs = get_target_outputs(":chromevox_test_deps_js")
   deps_js = test_deps_js_outputs[0]
   deps = [
     ":chromevox_test_deps_js",
   ]
   defines = [ "HAS_OUT_OF_PROC_TEST_RUNNER" ]
 }
 
 js2gtest("chromevox_extjs_tests") {
   test_type = "extension"
   sources = chromevox_tests_gypi_values.chromevox_tests_extjs_sources
   sources -= [ "braille/liblouis_test.extjs" ]  # TODO(GYP)
+  extra_gen_files =
+      chromevox_tests_gypi_values.chromevox_tests_ext_extra_js_sources
   defines = [ "HAS_OUT_OF_PROC_TEST_RUNNER" ]
 }