Teach PRESUBMIT.py how to run gn check for most of the mojo repo

mojo/apps/js/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.
 
 group("js") {
   # Meta-target, don't link into production code.
   testonly = true
   deps = [
     ":js_content_handler",
   ]
 }
 
 source_set("js_apps") {
   sources = [
     "js_app.cc",
     "mojo_bridge_module.cc",
   ]
 
   public_deps = [
     "//mojo/edk/js",
   ]
   deps = [
     "//mojo/application",
+    "//mojo/common",
     "//mojo/public/c/system:for_shared_library",
     "//mojo/public/cpp/utility",
   ]
 }
 
 shared_library("js_content_handler") {
   sources = [
     "content_handler_main.cc",
   ]
 
   deps = [
     ":js_apps",
     "//base:i18n",
     "//mojo/application:application",
     "//mojo/application:content_handler",
     "//mojo/environment:chromium",
     "//mojo/services/public/interfaces/content_handler",
   ]
 }