Mojo C++ bindings: make the generator use STL/WTF string/vector/map by default.

components/webmessaging.gypi

 # Copyright 2016 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,
     'mojom_files': [
       'webmessaging/public/interfaces/broadcast_channel.mojom',
     ],
@@ skipping 21 matching lines @@
         '../url/url.gyp:url_mojom',
       ],
       'export_dependent_settings': [
         '../url/url.gyp:url_mojom',
       ],
       'variables': {
         'mojom_typemaps': [
           '../url/mojo/gurl.typemap',
           '../url/mojo/origin.typemap',
         ],
+        'use_new_wrapper_types': 'false',
       },
       'includes': [
         '../mojo/mojom_bindings_generator.gypi',
       ],
     },
     {
       'target_name': 'webmessaging_mojo_bindings_for_blink',
       'type': 'static_library',
       'sources': [ '<@(mojom_files)' ],
       'dependencies': [
         '../url/url.gyp:url_mojom_for_blink',
       ],
       'export_dependent_settings': [
         '../url/url.gyp:url_mojom_for_blink',
       ],
       'variables': {
         'for_blink': 'true',
         'mojom_typemaps': [
           '../third_party/WebKit/Source/platform/mojo/KURL.typemap',
           '../third_party/WebKit/Source/platform/mojo/SecurityOrigin.typemap',
         ],
+        'use_new_wrapper_types': 'false',
       },
       'includes': [
         '../mojo/mojom_bindings_generator.gypi',
       ],
     },
   ],
 }