[Gin] Add a mechanism for wrapping C++ object

gin/gin.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': [
     {
       'target_name': 'gin',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../v8/tools/gyp/v8.gyp:v8',
       ],
       'export_dependent_settings': [
         '../base/base.gyp:base',
         '../v8/tools/gyp/v8.gyp:v8',
       ],
       'sources': [
-        'modules/console.cc',
-        'modules/console.h',
-        'modules/file_module_provider.cc',
-        'modules/file_module_provider.h',
-        'modules/module_registry.cc',
-        'modules/module_registry.h',
-        'modules/module_runner_delegate.cc',
-        'modules/module_runner_delegate.h',
         'arguments.cc',
         'arguments.h',
         'array_buffer.cc',
         'array_buffer.h',
         'context_holder.cc',
         'context_holder.h',
         'converter.cc',
         'converter.h',
         'dictionary.cc',
         'dictionary.h',
         'gin.cc',
         'gin.h',
+        'modules/console.cc',
+        'modules/console.h',
+        'modules/file_module_provider.cc',
+        'modules/file_module_provider.h',
+        'modules/module_registry.cc',
+        'modules/module_registry.h',
+        'modules/module_runner_delegate.cc',
+        'modules/module_runner_delegate.h',
         'per_context_data.cc',
         'per_context_data.h',
         'per_isolate_data.cc',
         'per_isolate_data.h',
+        'public/gin_embedders.h',
+        'public/wrapper_info.h',
         'runner.cc',
         'runner.h',
         'try_catch.cc',
         'try_catch.h',
+        'wrappable.cc',
+        'wrappable.h',
         'wrapper_info.cc',
-        'public/gin_embedders.h',
-        'public/wrapper_info.h',
       ],
     },
     {
       'target_name': 'gin_shell',
       'type': 'executable',
       'dependencies': [
         '../base/base.gyp:base_i18n',
         'gin',
       ],
       'sources': [
@@ skipping 30 matching lines @@
       'type': 'executable',
       'dependencies': [
         '../base/base.gyp:run_all_unittests',
         'gin_test',
       ],
       'sources': [
         'converter_unittest.cc',
         'test/run_all_unittests.cc',
         'test/run_js_tests.cc',
         'runner_unittest.cc',
+        'wrappable_unittest.cc',
       ],
     },
   ],
 }