Enable converting v8::Function to base::Callback.

atom/common/browser_v8_locker.h

@@ -0,0 +1,28 @@
+// Copyright (c) 2014 GitHub, Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_COMMON_LOCKED_HANDLE_SCOPE_H_
+#define ATOM_COMMON_LOCKED_HANDLE_SCOPE_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "v8/include/v8.h"
+
+namespace atom {
+
+// Like v8::Locker, but only do lock when in browser process.
+class BrowserV8Locker {
+ public:
+  BrowserV8Locker(v8::Isolate* isolate);
+  ~BrowserV8Locker();
+
+ private:
+  void* operator new(size_t size);
+  void operator delete(void*, size_t);
+
+  scoped_ptr<v8::Locker> locker_;
+};
+
+}  // namespace atom
+
+#endif  // ATOM_COMMON_LOCKED_HANDLE_SCOPE_H_