Restore the JS Spinning Cube demo

services/js/modules/gl/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.
 
 source_set("gl") {
   sources = [
     "context.cc",
     "context.h",
     "module.cc",
     "module.h",
   ]
 
   deps = [
     "//base",
     "//gin",
     "//v8",
+    "//gpu/command_buffer/client:gles2_interface",
+    "//mojo/public/c/gles2",
     "//mojo/edk/js",
     "//mojo/environment:chromium",
     "//mojo/public/c/gles2",
     "//mojo/public/cpp/environment",
   ]
 }