Remove all support for <applet> handling in Chrome.

Source/core/layout/LayoutApplet.h

Index: Source/core/layout/LayoutApplet.h
diff --git a/Source/core/layout/LayoutApplet.h b/Source/core/layout/LayoutApplet.h
deleted file mode 100644
index 741c1fc5ea4a8781efcb3579decf6eeb318010f4..0000000000000000000000000000000000000000
--- a/Source/core/layout/LayoutApplet.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
- * Copyright (C) 2006, 2007, 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 LayoutApplet_h
-#define LayoutApplet_h
-
-#include "core/layout/LayoutEmbeddedObject.h"
-
-namespace blink {
-
-class HTMLAppletElement;
-
-class LayoutApplet final : public LayoutEmbeddedObject {
-public:
-    explicit LayoutApplet(HTMLAppletElement*);
-    ~LayoutApplet() override;
-
-    const char* name() const override { return "LayoutApplet"; }
-};
-
-} // namespace blink
-
-#endif // LayoutApplet_h