allow disabling of ArrayBuffer neutering

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 2938 matching lines @@
   static Local<ArrayBuffer> New(Isolate* isolate, void* data,
                                 size_t byte_length);
 
   /**
    * Returns true if ArrayBuffer is extrenalized, that is, does not
    * own its memory block.
    */
   bool IsExternal() const;
 
   /**
+   * Returns true if this ArrayBuffer may be neutered.
+   */
+  bool IsNeuterable() const;
+
+  /**
    * Neuters this ArrayBuffer and all its views (typed arrays).
    * Neutering sets the byte length of the buffer and all typed arrays to zero,
    * preventing JavaScript from ever accessing underlying backing store.
-   * ArrayBuffer should have been externalized.
+   * ArrayBuffer should have been externalized and must be neuterable.
    */
   void Neuter();
 
   /**
    * Make this ArrayBuffer external. The pointer to underlying memory block
    * and byte length are returned as |Contents| structure. After ArrayBuffer
    * had been etxrenalized, it does no longer owns the memory block. The caller
    * should take steps to free memory when it is no longer needed.
    *
    * The memory block is guaranteed to be allocated with |Allocator::Allocate|
@@ skipping 4365 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_