Refactor prototype setting code and expose SetPrototype to public V8 API.

include/v8.h

 // Copyright 2007-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1179 matching lines @@
   Local<Array> GetPropertyNames();
 
   /**
    * Get the prototype object.  This does not skip objects marked to
    * be skipped by __proto__ and it does not consult the security
    * handler.
    */
   Local<Value> GetPrototype();
 
   /**
+   * Set the prototype object.  This does not skip objects marked to
+   * be skipped by __proto__ and it does not consult the security
+   * handler.
+   */
+  bool SetPrototype(Handle<Value> prototype);
+
+  /**
    * Finds an instance of the given function template in the prototype
    * chain.
    */
   Local<Object> FindInstanceInPrototypeChain(Handle<FunctionTemplate> tmpl);
 
   /**
    * Call builtin Object.prototype.toString on this object.
    * This is different from Value::ToString() that may call
    * user-defined toString function. This one does not.
    */
@@ skipping 2017 matching lines @@
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef V8EXPORT_INLINE
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_