Remove all support for <applet> handling in Chrome.

Source/core/html/HTMLAppletElement.h

Index: Source/core/html/HTMLAppletElement.h
diff --git a/Source/core/html/HTMLAppletElement.h b/Source/core/html/HTMLAppletElement.h
deleted file mode 100644
index 397aa54d4f5662991b314ba81bd682039639355c..0000000000000000000000000000000000000000
--- a/Source/core/html/HTMLAppletElement.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
- *           (C) 1999 Antti Koivisto (koivisto@kde.org)
- * Copyright (C) 2004, 2006, 2008, 2009 Apple Inc. All rights reserved.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- */
-
-#ifndef HTMLAppletElement_h
-#define HTMLAppletElement_h
-
-#include "core/html/HTMLPlugInElement.h"
-
-namespace blink {
-
-class KURL;
-
-class HTMLAppletElement final : public HTMLPlugInElement {
-    DEFINE_WRAPPERTYPEINFO();
-public:
-    static PassRefPtrWillBeRawPtr<HTMLAppletElement> create(Document&, bool createdByParser);
-
-protected:
-    LayoutPart* layoutPartForJSBindings() const override;
-
-private:
-    HTMLAppletElement(Document&, bool createdByParser);
-
-    void parseAttribute(const QualifiedName&, const AtomicString&) override;
-    bool isURLAttribute(const Attribute&) const override;
-    bool hasLegalLinkAttribute(const QualifiedName&) const override;
-
-    bool layoutObjectIsNeeded(const ComputedStyle&) override;
-    LayoutObject* createLayoutObject(const ComputedStyle&) override;
-
-    LayoutPart* existingLayoutPart() const override;
-    void updateWidgetInternal() override;
-
-    bool canEmbedURL(const KURL&) const;
-
-    bool shouldRegisterAsNamedItem() const override { return true; }
-    bool shouldRegisterAsExtraNamedItem() const override { return true; }
-};
-
-} // namespace blink
-
-#endif // HTMLAppletElement_h