Remove beforeload events.

Source/core/dom/ProcessingInstruction.cpp

 /*
  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
  * Copyright (C) 2006, 2008, 2009 Apple Inc. All rights reserved.
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 104 matching lines @@
             // to kick off import/include loads that can hang off some parent sheet.
             if (m_isXSL) {
                 KURL finalURL(ParsedURLString, m_localHref);
                 m_sheet = XSLStyleSheet::createEmbedded(this, finalURL);
                 m_loading = false;
             }
         } else {
             clearResource();
 
             String url = document().completeURL(href).string();
-            if (!dispatchBeforeLoadEvent(url))
-                return;
 
             ResourcePtr<StyleSheetResource> resource;
             FetchRequest request(ResourceRequest(document().completeURL(href)), FetchInitiatorTypeNames::processinginstruction);
             if (m_isXSL) {
                 resource = document().fetcher()->fetchXSLStyleSheet(request);
             } else {
                 String charset = attrs.get("charset");
                 if (charset.isEmpty())
                     charset = document().charset();
                 request.setCharset(charset);
@@ skipping 109 matching lines @@
         m_sheet->clearOwnerNode();
         m_sheet = nullptr;
     }
 
     // If we're in document teardown, then we don't need to do any notification of our sheet's removal.
     if (document().isActive())
         document().removedStyleSheet(removedSheet.get());
 }
 
 } // namespace