Empty object@data url shouldn't be resolved and loaded

Source/core/html/HTMLPlugInElement.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 483 matching lines @@
 }
 
 bool HTMLPlugInElement::requestObject(const String& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues)
 {
     if (url.isEmpty() && mimeType.isEmpty())
         return false;
 
     if (protocolIsJavaScript(url))
         return false;
 
-    KURL completedURL = document().completeURL(url);
+    KURL completedURL = url.isEmpty() ? KURL() : document().completeURL(url);
     if (!pluginIsLoadable(completedURL, mimeType))
         return false;
 
     bool useFallback;
     if (shouldUsePlugin(completedURL, mimeType, hasFallbackContent(), useFallback))
         return loadPlugin(completedURL, mimeType, paramNames, paramValues, useFallback, true);
 
     // If the plugin element already contains a subframe,
     // loadOrRedirectSubframe will re-use it. Otherwise, it will create a new
     // frame and set it as the LayoutPart's widget, causing what was previously
@@ skipping 153 matching lines @@
     return hasOpenShadowRoot();
 }
 
 void HTMLPlugInElement::lazyReattachIfNeeded()
 {
     if (!useFallbackContent() && !usePlaceholderContent() && needsWidgetUpdate() && layoutObject() && !isImageType())
         lazyReattachIfAttached();
 }
 
 }