Remove all support for <applet> handling in Chrome.

Source/core/html/parser/HTMLTreeBuilder.cpp

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  * Copyright (C) 2011, 2014 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 734 matching lines @@
     if (token->name() == nobrTag) {
         m_tree.reconstructTheActiveFormattingElements();
         if (m_tree.openElements()->inScope(nobrTag)) {
             parseError(token);
             processFakeEndTag(nobrTag);
             m_tree.reconstructTheActiveFormattingElements();
         }
         m_tree.insertFormattingElement(token);
         return;
     }
-    if (token->name() == appletTag
-        || token->name() == embedTag
+    if (token->name() == embedTag
         || token->name() == objectTag) {
         if (!pluginContentIsAllowed(m_tree.parserContentPolicy()))
             return;
     }
-    if (token->name() == appletTag
-        || token->name() == marqueeTag
+    if (token->name() == marqueeTag
         || token->name() == objectTag) {
         m_tree.reconstructTheActiveFormattingElements();
         m_tree.insertHTMLElement(token);
         m_tree.activeFormattingElements()->appendMarker();
         m_framesetOk = false;
         return;
     }
     if (token->name() == tableTag) {
         if (!m_tree.inQuirksMode() && m_tree.openElements()->inButtonScope(pTag))
             processFakeEndTag(pTag);
@@ skipping 1080 matching lines @@
         m_tree.generateImpliedEndTags();
         if (!m_tree.currentStackItem()->matchesHTMLTag(token->name()))
             parseError(token);
         m_tree.openElements()->popUntilNumberedHeaderElementPopped();
         return;
     }
     if (isFormattingTag(token->name())) {
         callTheAdoptionAgency(token);
         return;
     }
-    if (token->name() == appletTag
-        || token->name() == marqueeTag
+    if (token->name() == marqueeTag
         || token->name() == objectTag) {
         if (!m_tree.openElements()->inScope(token->name())) {
             parseError(token);
             return;
         }
         m_tree.generateImpliedEndTags();
         if (!m_tree.currentStackItem()->matchesHTMLTag(token->name()))
             parseError(token);
         m_tree.openElements()->popUntilPopped(token->name());
         m_tree.activeFormattingElements()->clearToLastMarker();
@@ skipping 929 matching lines @@
     ASSERT(m_isAttached);
     // Warning, this may detach the parser. Do not do anything else after this.
     m_tree.finishedParsing();
 }
 
 void HTMLTreeBuilder::parseError(AtomicHTMLToken*)
 {
 }
 
 } // namespace blink