Make async waiter explicit MojoGLES2CreateContext param

mojo/mojo_examples.gypi

 # Copyright 2013 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.
 
 {
   'targets': [
     {
       'target_name': 'mojo_echo_client',
       'type': 'loadable_module',
       'dependencies': [
@@ skipping 361 matching lines @@
         'mojo_base.gyp:mojo_application_chromium',
         'mojo_base.gyp:mojo_common_lib',
         'mojo_base.gyp:mojo_environment_chromium',
         'mojo_base.gyp:mojo_system_impl',
         'mojo_geometry_bindings',
         'mojo_geometry_lib',
         'mojo_native_viewport_bindings',
         'mojo_surfaces_bindings',
         'mojo_surfaces_app_bindings',
         'mojo_surfaces_lib',
-        '<(mojo_gles2_for_loadable_module)',
         '<(mojo_system_for_loadable_module)',
       ],
       'sources': [
         'examples/surfaces_app/embedder.cc',
         'examples/surfaces_app/embedder.h',
         'examples/surfaces_app/surfaces_app.cc',
         'examples/surfaces_app/surfaces_util.cc',
         'examples/surfaces_app/surfaces_util.h',
         'public/cpp/application/lib/mojo_main_chromium.cc',
       ],
@@ skipping 452 matching lines @@
           ],
           'sources': [
             'examples/dbus_echo/dbus_echo_app.cc',
             'public/cpp/application/lib/mojo_main_standalone.cc',
           ],
         },
       ],
     }],
   ],
 }