Allow JavaScript accessors on API objects.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 54c6dcd92c9739da6c01da01e4f278a6faa6de45..6402c3ef709937e53e46b6eff366efbb153124b2 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -4027,6 +4027,14 @@ class V8_EXPORT Template : public Data {
      PropertyAttribute attribute = None,
      AccessControl settings = DEFAULT);
 
+#ifdef V8_JS_ACCESSORS
+  void SetAccessorProperty(Local<Name> name,
+                           Local<Function> getter = Local<Function>(),
+                           Local<Function> setter = Local<Function>(),
+                           PropertyAttribute attribute = None,
+                           AccessControl settings = DEFAULT);
+#endif  // V8_JS_ACCESSORS
+
   /**
    * Whenever the property with the given name is accessed on objects
    * created from this Template the getter and setter callbacks