Add gin, a lightweight bindings system for V8

gin/per_isolate_data.cc

Index: gin/per_isolate_data.cc
diff --git a/gin/per_isolate_data.cc b/gin/per_isolate_data.cc
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+// 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.
+
+#include "gin/per_isolate_data.h"
+
+using v8::Eternal;
+using v8::Handle;
+using v8::Isolate;
+using v8::Local;
+using v8::Object;
+using v8::ObjectTemplate;
+
+namespace gin {
+
+PerIsolateData::PerIsolateData(Isolate* isolate)
+    : isolate_(isolate)  {
+  isolate_->SetData(this);
+}
+
+PerIsolateData::~PerIsolateData() {
+}
+
+PerIsolateData* PerIsolateData::From(Isolate* isolate) {
+  return static_cast<PerIsolateData*>(isolate->GetData());
+}
+
+void PerIsolateData::RegisterObjectTemplate(
+    WrapperInfo* info, Local<ObjectTemplate> object_template) {
+  object_templates_[info] = Eternal<ObjectTemplate>(isolate_, object_template);
+}
+
+Handle<Object> PerIsolateData::CreateObject(WrapperInfo* info) {
+  Handle<ObjectTemplate> templ = object_templates_[info].Get(isolate_);
+  Handle<Object> object = templ->NewInstance();
+  object->SetAlignedPointerInInternalField(kWrapperInfoIndex, info);
+  return object;
+}
+
+}  // namespace gin