Implement immutable prototype chains

include/v8.h

 // Copyright 2012 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.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 4815 matching lines @@
    * this template.
    */
   int InternalFieldCount();
 
   /**
    * Sets the number of internal fields for objects generated from
    * this template.
    */
   void SetInternalFieldCount(int value);
 
+  /**
+   * Returns true if the object will be an immutable prototype exotic object.
+   */
+  bool ImmutableProto();

[jochen (gone - plz use gerrit), 2016/07/01 14:16:09]

nit. IsImmutableProto()?

[Dan Ehrenberg, 2016/07/01 18:51:28]

Done

+
+  /**
+   * Makes the ObjectTempate for an immutable prototype exotic object, with an
+   * immutable __proto__.
+   */
+  void SetImmutableProto();
+
  private:
   ObjectTemplate();
   static Local<ObjectTemplate> New(internal::Isolate* isolate,
                                    Local<FunctionTemplate> constructor);
   friend class FunctionTemplate;
 };
 
 
 /**
  * A Signature specifies which receiver is valid for a function.
@@ skipping 4055 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_