Add the c++ code part of bindings2/

sky/engine/bindings2/builtin_natives.h

Index: sky/engine/bindings2/builtin_natives.h
diff --git a/sky/engine/bindings2/builtin_natives.h b/sky/engine/bindings2/builtin_natives.h
new file mode 100644
index 0000000000000000000000000000000000000000..84b371738a4d1e748ae119c26a51b37a11a76a29
--- /dev/null
+++ b/sky/engine/bindings2/builtin_natives.h
@@ -0,0 +1,28 @@
+// 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 file.
+
+#ifndef SKY_ENGINE_BINDINGS2_BUILTIN_NATIVES_H_
+#define SKY_ENGINE_BINDINGS2_BUILTIN_NATIVES_H_
+
+#include "base/macros.h"
+#include "dart/runtime/include/dart_api.h"
+
+namespace blink {
+
+class BuiltinNatives {
+ public:
+  static Dart_NativeFunction NativeLookup(Dart_Handle name,
+                                          int argument_count,
+                                          bool* auto_setup_scope);
+  static const uint8_t* NativeSymbol(Dart_NativeFunction native_function);
+
+  static void Init();
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(BuiltinNatives);
+};
+
+}  // namespace blink
+
+#endif  // SKY_ENGINE_BINDINGS2_BUILTIN_NATIVES_H_