Introduce isHTMLOptGroupElement and toHTMLOptGroupElement

Source/core/html/parser/HTMLConstructionSite.cpp

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 19 matching lines @@
 #include "HTMLElementFactory.h"
 #include "HTMLNames.h"
 #include "core/dom/Comment.h"
 #include "core/dom/DocumentFragment.h"
 #include "core/dom/DocumentType.h"
 #include "core/dom/Element.h"
 #include "core/dom/ScriptLoader.h"
 #include "core/dom/Text.h"
 #include "core/html/HTMLFormElement.h"
 #include "core/html/HTMLHtmlElement.h"
+#include "core/html/HTMLOptGroupElement.h"
 #include "core/html/HTMLScriptElement.h"
 #include "core/html/HTMLTemplateElement.h"
 #include "core/html/parser/AtomicHTMLToken.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/html/parser/HTMLStackItem.h"
 #include "core/html/parser/HTMLToken.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/page/Frame.h"
 #include "core/platform/NotImplemented.h"
@@ skipping 11 matching lines @@
         element->stripScriptingAttributes(token->attributes());
     element->parserSetAttributes(token->attributes());
 }
 
 static bool hasImpliedEndTag(const HTMLStackItem* item)
 {
     return item->hasTagName(ddTag)
         || item->hasTagName(dtTag)
         || item->hasTagName(liTag)
         || item->hasTagName(optionTag)
-        || item->hasTagName(optgroupTag)
+        || isHTMLOptGroupElement(item->node())
         || item->hasTagName(pTag)
         || item->hasTagName(rpTag)
         || item->hasTagName(rtTag);
 }
 
 static bool shouldUseLengthLimit(const ContainerNode* node)
 {
     return !node->hasTagName(scriptTag)
         && !node->hasTagName(styleTag)
         && !node->hasTagName(SVGNames::scriptTag);
@@ skipping 677 matching lines @@
 {
     HTMLConstructionSiteTask task(HTMLConstructionSiteTask::Insert);
     findFosterSite(task);
     task.child = node;
     ASSERT(task.parent);
 
     m_taskQueue.append(task);
 }
 
 }