mojo: Generate top level enums for python bindings.

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.
 
 {
   'target_defaults': {
     'conditions': [
       ['mojo_shell_debug_url != ""', {
         'defines': [
           'MOJO_SHELL_DEBUG=1',
@@ skipping 71 matching lines @@
           ],
         }],
         ['OS == "linux"', {
           'dependencies': [
             'mojo_dbus_echo',
             'mojo_dbus_echo_service',
           ],
         }],
         ['component != "shared_library" and OS == "linux"', {
           'dependencies': [
+            'mojo_python_bindings',
             'mojo_python_embedder',
             'mojo_python_system',
             'mojo_python',
           ],
         }],
       ]
     },
     {
       # GN version: //mojo/shell:external_service_bindings
       'target_name': 'mojo_external_service_bindings',
@@ skipping 473 matching lines @@
           },
           'sources': [
             'python/system/mojo/embedder.pyx',
           ],
           'dependencies': [
             'mojo_base.gyp:mojo_system_impl',
           ],
           'includes': [ '../third_party/cython/cython_compiler.gypi' ],
         },
         {
+          'target_name': 'mojo_python_bindings',
+          'type': 'none',
+          'variables': {
+            'python_base_module': 'mojo/bindings',
+          },
+          'sources': [
+            'public/python/mojo/bindings/__init__.py',
+            'public/python/mojo/bindings/reflection.py',
+          ],
+          'dependencies': [
+            'mojo_python_system',
+          ],
+          'includes': [ '../third_party/cython/python_module.gypi' ],
+        },
+        {
           'target_name': 'mojo_python',
           'type': 'none',
           'variables': {
             'python_base_module': 'mojo',
           },
           'sources': [
             'public/python/mojo/__init__.py',
           ],
           'dependencies': [
+            'mojo_python_bindings',
             'mojo_python_embedder',
             'mojo_python_system',
           ],
           'includes': [ '../third_party/cython/python_module.gypi' ],
         },
       ],
     }],
   ],
 }