Implement Asynchronous Module Definition API for Mojo

gin/context_holder.h

+// 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.
+
+#ifndef GIN_CONTEXT_HOLDER_H_
+#define GIN_CONTEXT_HOLDER_H_
+
+#include <list>
+#include "base/basictypes.h"
+#include "v8/include/v8.h"
+
+namespace gin {
+
+class ContextHolder {
+ public:
+  explicit ContextHolder(v8::Isolate* isolate);
+  ~ContextHolder();
+
+  v8::Isolate* isolate() const { return isolate_; }
+
+  v8::Handle<v8::Context> context() const {
+    return v8::Local<v8::Context>::New(isolate_, context_);
+  }
+
+  void SetContext(v8::Handle<v8::Context> context);
+
+ private:
+  v8::Isolate* isolate_;
+  v8::Persistent<v8::Context> context_;
+
+  DISALLOW_COPY_AND_ASSIGN(ContextHolder);
+};
+
+}  // namespace gin
+
+#endif  // GIN_CONTEXT_HOLDER_H_