Remove all support for <applet> handling in Chrome.

Source/core/html/WindowNameCollection.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/html/WindowNameCollection.h"
 
 #include "core/html/HTMLImageElement.h"
 
 namespace blink {
 
 WindowNameCollection::WindowNameCollection(ContainerNode& document, const AtomicString& name)
     : HTMLNameCollection(document, WindowNamedItems, name)
 {
 }
 
 bool WindowNameCollection::elementMatches(const Element& element) const
 {
-    // Match only images, forms, applets, embeds and objects by name,
+    // Match only images, forms, embeds and objects by name,
     // but anything by id
     if (isHTMLImageElement(element)
         || isHTMLFormElement(element)
-        || isHTMLAppletElement(element)
         || isHTMLEmbedElement(element)
         || isHTMLObjectElement(element)) {
         if (element.getNameAttribute() == m_name)
             return true;
     }
     return element.getIdAttribute() == m_name;
 }
 
 } // namespace blink