Introduce extras export object.

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.
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   enum EmbedderDataFields { kDebugIdIndex = 0 };
 
   /**
    * Gets the embedder data with the given index, which must have been set by a
    * previous call to SetEmbedderData with the same index. Note that index 0
    * currently has a special meaning for Chrome's debugger.
    */
   V8_INLINE Local<Value> GetEmbedderData(int index);
 
   /**
+   * Gets the exports object used by V8 extras. Extra natives get a reference
+   * to this object and can use it to export functionality.
+   */
+  Local<Object> GetExtrasExportsObject();
+
+  /**
    * Sets the embedder data with the given index, growing the data as
    * needed. Note that index 0 currently has a special meaning for Chrome's
    * debugger.
    */
   void SetEmbedderData(int index, Handle<Value> value);
 
   /**
    * Gets a 2-byte-aligned native pointer from the embedder data with the given
    * index, which must have bees set by a previous call to
    * SetAlignedPointerInEmbedderData with the same index. Note that index 0
@@ skipping 1639 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_