Move the contents of api-natives.js to c++

src/api-natives.h

+// Copyright 2015 the V8 project 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 V8_API_NATIVES_H_
+#define V8_API_NATIVES_H_
+
+#include "src/handles.h"
+
+namespace v8 {
+namespace internal {
+
+class ApiNatives {
+ public:
+  MUST_USE_RESULT static MaybeHandle<JSFunction> InstantiateFunction(
+      Handle<FunctionTemplateInfo> data);
+  MUST_USE_RESULT static MaybeHandle<JSObject> InstantiateObject(
+      Handle<ObjectTemplateInfo> data);
+  MUST_USE_RESULT static MaybeHandle<FunctionTemplateInfo> ConfigureInstance(
+      Isolate* isolate, Handle<FunctionTemplateInfo> instance,
+      Handle<JSObject> data);
+
+  enum ApiInstanceType {
+    JavaScriptObjectType,
+    GlobalObjectType,
+    GlobalProxyType
+  };
+
+  static Handle<JSFunction> CreateApiFunction(Isolate* isolate,
+                                              Handle<FunctionTemplateInfo> obj,
+                                              Handle<Object> prototype,
+                                              ApiInstanceType instance_type);
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif