Rename sky/engine/bindings2 to sky/engine/bindings

sky/engine/bindings2/builtin_natives.h

-// 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_