Handle case for embed tag.

dom/src/build/nsDOMFactory.cpp

@@ -454,8 +454,12 @@ nsDOMScriptObjectFactory::NewScriptElement(const nsString &aTagName,
       return NS_NewScriptHTMLOListElement(aContext, aElement, aParent, aReturn);
     case DOMHTMLTag_object:
       return NS_NewScriptHTMLObjectElement(aContext, aElement, aParent, aReturn);
-//    case DOMHTMLTag_embed:
-//      return NS_NewScriptHTMLEmbedElement(aContext, aElement, aParent, aReturn);
+
+#ifdef XP_UNIX
+    case DOMHTMLTag_embed:
+      return NS_NewScriptHTMLEmbedElement(aContext, aElement, aParent, aReturn);
+#endif
+
     case DOMHTMLTag_optgroup:
       return NS_NewScriptHTMLOptGroupElement(aContext, aElement, aParent, aReturn);
     case DOMHTMLTag_option: