[api] Support sharing prototypes between FunctionTemplates

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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   void SetCallHandler(
       FunctionCallback callback, Local<Value> data = Local<Value>(),
       experimental::FastAccessorBuilder* fast_handler = nullptr);
 
   /** Set the predefined length property for the FunctionTemplate. */
   void SetLength(int length);
 
   /** Get the InstanceTemplate. */
   Local<ObjectTemplate> InstanceTemplate();
 
-  /** Causes the function template to inherit from a parent function template.*/
+  /**
+   * Causes the function template to inherit from a parent function template.
+   * This means the the function's prototype.__proto__ is set to the parent
+   * function's prototype.
+   **/
   void Inherit(Local<FunctionTemplate> parent);
 
   /**
    * A PrototypeTemplate is the template used to create the prototype object
    * of the function created by this template.
    */
   Local<ObjectTemplate> PrototypeTemplate();
 
   /**
+   * A PrototypeProviderTemplate is another function template whose prototype
+   * property is used for this template. This is mutually exclusive with setting
+   * a prototype template indirectly by calling PrototypeTemplate() or using
+   * Inherit().
+   **/
+  void SetPrototypeProviderTemplate(Local<FunctionTemplate> prototype_provider);
+
+  /**
    * Set the class name of the FunctionTemplate.  This is used for
    * printing objects created with the function created from the
    * FunctionTemplate as its constructor.
    */
   void SetClassName(Local<String> name);
 
 
   /**
    * When set to true, no access check will be performed on the receiver of a
    * function call.  Currently defaults to true, but this is subject to change.
@@ skipping 4518 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_