Remove all support for <applet> handling in Chrome.

Source/core/html/parser/HTMLStackItem.h

 /*
  * Copyright (C) 2012 Company 100, 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 116 matching lines @@
             || hasTagName(SVGNames::foreignObjectTag)
             || hasTagName(SVGNames::descTag)
             || hasTagName(SVGNames::titleTag))
             return true;
         if (isDocumentFragmentNode())
             return true;
         if (!isInHTMLNamespace())
             return false;
         const AtomicString& tagName = localName();
         return tagName == HTMLNames::addressTag
-            || tagName == HTMLNames::appletTag
             || tagName == HTMLNames::areaTag
             || tagName == HTMLNames::articleTag
             || tagName == HTMLNames::asideTag
             || tagName == HTMLNames::baseTag
             || tagName == HTMLNames::basefontTag
             || tagName == HTMLNames::bgsoundTag
             || tagName == HTMLNames::blockquoteTag
             || tagName == HTMLNames::bodyTag
             || tagName == HTMLNames::brTag
             || tagName == HTMLNames::buttonTag
@@ skipping 92 matching lines @@
 
     AtomicString m_tokenLocalName;
     Vector<Attribute> m_tokenAttributes;
     AtomicString m_namespaceURI;
     bool m_isDocumentFragmentNode;
 };
 
 } // namespace blink
 
 #endif // HTMLStackItem_h