Mojo C++ bindigns: fix generated namespace when variant is specified.

mojo/mojo_edk_tests.gyp

 # Copyright 2015 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.
 
 {
   'includes': [
     'mojo_variables.gypi',
   ],
   'targets': [
     {
@@ skipping 37 matching lines @@
         'mojo_edk.gyp:mojo_run_all_unittests',
         'mojo_public.gyp:mojo_cpp_bindings',
         'mojo_public.gyp:mojo_message_pump_lib',
         'mojo_public.gyp:mojo_public_bindings_test_utils',
         'mojo_public.gyp:mojo_public_test_associated_interfaces',
         'mojo_public.gyp:mojo_public_test_interfaces',
         'mojo_public.gyp:mojo_public_test_interfaces_blink',
         'mojo_public.gyp:mojo_public_test_interfaces_chromium',
         'mojo_public.gyp:mojo_public_test_interfaces_struct_traits',
         'mojo_public.gyp:mojo_public_test_utils',
+        'mojo_public.gyp:mojo_public_test_variant',
       ],
       'sources': [
         'public/cpp/bindings/tests/array_common_test.h',
         'public/cpp/bindings/tests/array_unittest.cc',
         'public/cpp/bindings/tests/associated_interface_unittest.cc',
         'public/cpp/bindings/tests/binding_callback_unittest.cc',
         'public/cpp/bindings/tests/binding_unittest.cc',
         'public/cpp/bindings/tests/bounds_checker_unittest.cc',
         'public/cpp/bindings/tests/buffer_unittest.cc',
         'public/cpp/bindings/tests/callback_unittest.cc',
@@ skipping 235 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'mojo_public_system_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }