[gin] Add a v8::Platform implementation to allow for v8 posting tasks

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': '<(component)',
       'dependencies': [
         '../base/base.gyp:base',
+        '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../v8/tools/gyp/v8.gyp:v8',
+
       ],
       'export_dependent_settings': [
         '../base/base.gyp:base',
         '../v8/tools/gyp/v8.gyp:v8',
       ],
       'defines': [
         'GIN_IMPLEMENTATION',
       ],
       'sources': [
         'arguments.cc',
@@ skipping 25 matching lines @@
         'modules/timer.h',
         'object_template_builder.cc',
         'object_template_builder.h',
         'per_context_data.cc',
         'per_context_data.h',
         'per_isolate_data.cc',
         'per_isolate_data.h',
         'public/context_holder.h',
         'public/gin_embedders.h',
         'public/isolate_holder.h',
+        'public/v8_platform.h',
         'public/wrapper_info.h',
         'runner.cc',
         'runner.h',
         'shell_runner.cc',
         'shell_runner.h',
         'try_catch.cc',
         'try_catch.h',
+        'v8_platform.cc',
         'wrappable.cc',
         'wrappable.h',
         'wrapper_info.cc',
       ],
     },
     {
       'target_name': 'gin_shell',
       'type': 'executable',
       'dependencies': [
         '../base/base.gyp:base',
@@ skipping 48 matching lines @@
         'modules/timer_unittest.cc',
         'per_context_data_unittest.cc',
         'shell_runner_unittest.cc',
         'test/run_all_unittests.cc',
         'test/run_js_tests.cc',
         'wrappable_unittest.cc',
       ],
     },
   ],
 }