Remove almost all clients of isHTMLElement

sky/engine/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 155 matching lines @@
 PassRefPtr<Element> Element::cloneElementWithChildren()
 {
     RefPtr<Element> clone = cloneElementWithoutChildren();
     cloneChildNodes(clone.get());
     return clone.release();
 }
 
 PassRefPtr<Element> Element::cloneElementWithoutChildren()
 {
     RefPtr<Element> clone = cloneElementWithoutAttributesAndChildren();
-    // This will catch HTML elements in the wrong namespace that are not correctly copied.
-    // This is a sanity check as HTML overloads some of the DOM methods.
-    ASSERT(isHTMLElement() == clone->isHTMLElement());
-
     clone->cloneDataFromElement(*this);
     return clone.release();
 }
 
 PassRefPtr<Element> Element::cloneElementWithoutAttributesAndChildren()
 {
     return document().createElement(tagQName(), false);
 }
 
 void Element::removeAttribute(const QualifiedName& name)
@@ skipping 1384 matching lines @@
         return false;
     if (treeScope().scopedStyleResolver().hasSelectorForId(idValue))
         return true;
     // Host rules could also have effects.
     if (ShadowRoot* shadowRoot = this->shadowRoot())
         return shadowRoot->scopedStyleResolver().hasSelectorForId(idValue);
     return false;
 }
 
 } // namespace blink