Mojo C++ bindings: remove use_new_wrapper_types=false from all remaining targets im mojo/ folder.

mojo/mojo_base.gyp

 # 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.
 
 # Essential components (and their tests) that are needed to build
 # Chrome should be here.  Other components that are useful only in
 # Mojo land like mojo_shell should be in mojo.gyp.
 {
   'variables': {
     'chromium_code': 1,
@@ skipping 47 matching lines @@
       # GN version: //mojo/common:common_custom_types
       'target_name': 'mojo_common_custom_types_mojom',
       'type': 'none',
       'variables': {
         'mojom_files': [
           'common/common_custom_types.mojom',
         ],
         'mojom_typemaps': [
           'common/common_custom_types.typemap',
         ],
-        'use_new_wrapper_types': 'false',
       },
       'dependencies': [
         '../ipc/ipc.gyp:ipc',
       ],
       'includes': [ 'mojom_bindings_generator_explicit.gypi' ],
     },
     {
       # GN version: //mojo/common:test_common_custom_types
       'target_name': 'mojo_test_common_custom_types',
       'type': 'static_library',
       'variables': {
         'mojom_typemaps': [
           'common/common_custom_types.typemap',
         ],
-        'use_new_wrapper_types': 'false',
       },
       'sources': [
         'common/test_common_custom_types.mojom',
       ],
       'dependencies': [
         'mojo_common_custom_types_mojom',
       ],
       'includes': [ 'mojom_bindings_generator.gypi' ],
     },
     {
@@ skipping 91 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'mojo_common_unittests.isolate',
           ],
         },
       ],
     }],
   ]
 }