Add Object::IsDirty function in the API.

include/v8.h

 // Copyright 2007-2008 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 1220 matching lines @@
 
   /**
    * Access hidden properties on JavaScript objects. These properties are
    * hidden from the executing JavaScript and only accessible through the V8
    * C++ API. Hidden properties introduced by V8 internally (for example the
    * identity hash) are prefixed with "v8::".
    */
   bool SetHiddenValue(Handle<String> key, Handle<Value> value);
   Local<Value> GetHiddenValue(Handle<String> key);
   bool DeleteHiddenValue(Handle<String> key);
+  
+  /**
+   * Returns true if this is an instance of an api function (one
+   * created from a function created from a function template) and has
+   * been modified since it was created.  Note that this method is
+   * conservative and may return true for objects that haven't actually
+   * been modified.
+   */
+  bool IsDirty();
 
   /**
    * Clone this object with a fast but shallow copy.  Values will point
    * to the same values as the original object.
    */
   Local<Object> Clone();
 
   /**
    * Set the backing store of the indexed properties to be managed by the
    * embedding layer. Access to the indexed properties will follow the rules
@@ skipping 1829 matching lines @@
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef V8EXPORT_INLINE
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_