Use WebScopedRunV8Script in converted C++ functions

atom/common/api/locker.h

@@ -0,0 +1,34 @@
+// Copyright 2014 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.chromium file.
+
+#ifndef ATOM_COMMON_API_LOCKER_H_
+#define ATOM_COMMON_API_LOCKER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "v8/include/v8.h"
+
+namespace mate {
+
+// Only lock when lockers are used in current thread.
+class Locker {
+ public:
+  explicit Locker(v8::Isolate* isolate);
+  ~Locker();
+
+  // Returns whether current process is browser process, currently we detect it
+  // by checking whether current has used V8 Lock, but it might be a bad idea.
+  static inline bool IsBrowserProcess() { return v8::Locker::IsActive(); }
+
+ private:
+  void* operator new(size_t size);
+  void operator delete(void*, size_t);
+
+  scoped_ptr<v8::Locker> locker_;
+
+  DISALLOW_COPY_AND_ASSIGN(Locker);
+};
+
+}  // namespace mate
+
+#endif  // ATOM_COMMON_API_LOCKER_H_