Add a basic NativeViewportX11 for Mojo

mojo/mojo.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 158 matching lines @@
             4267,
           ],
         }],
       ],
     },
     {
       'target_name': 'mojo_shell',
       'type': 'executable',
       'dependencies': [
         '../base/base.gyp:base',
+        '../ui/gl/gl.gyp:gl',
         '../url/url.gyp:url_lib',
         'mojo_shell_lib',
         'mojo_system',
       ],
       'sources': [
         'shell/desktop/mojo_main.cc',
       ],
       'conditions': [
         ['OS == "win"', {
           # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
@@ skipping 201 matching lines @@
             'java_in_dir': '<(DEPTH)/mojo/shell/android/apk',
             'resource_dir': '<(DEPTH)/mojo/shell/android/apk/res',
             'native_lib_target': 'libmojo_shell',
           },
           'includes': [ '../build/java_apk.gypi' ],
         }
       ],
     }],
   ],
 }