Mojo JS bindings: flip the default value of use_new_js_bindings to true.

mojo/edk/js/tests/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("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 
 # TODO(hansmuller): The organization of tests in this directory is weird:
 #   * Really, js_unittests tests public stuff, so that should live in public
 #     and be reworked as some sort of apptest.
@@ skipping 30 matching lines @@
     "js_to_cpp_tests.js",
   ]
 
   configs += [ "//v8:external_startup_data" ]
 }
 
 mojom("js_to_cpp_bindings") {
   sources = [
     "js_to_cpp.mojom",
   ]
+
+  # TODO(crbug.com/699569): Convert to use the new JS bindings.
+  use_new_js_bindings = false
 }
 
 test("mojo_js_unittests") {
   deps = [
     "//base",
     "//gin:gin_test",
     "//mojo/edk/js",
     "//mojo/edk/test:run_all_unittests",
     "//mojo/edk/test:test_support",
     "//mojo/public/cpp/system",
     "//mojo/public/interfaces/bindings/tests:test_associated_interfaces",
     "//mojo/public/interfaces/bindings/tests:test_interfaces",
     "//mojo/public/js:tests",
   ]
 
   sources = [
     "//mojo/edk/js/handle_unittest.cc",
     "run_js_unittests.cc",
   ]
 }