Remove the (already disabled) OverflowChangedEvent runtime flag

Source/core/events/OverflowEvent.h

Index: Source/core/events/OverflowEvent.h
diff --git a/Source/core/events/OverflowEvent.h b/Source/core/events/OverflowEvent.h
deleted file mode 100644
index 5a107e45cacd4057f51455238df9b656751b7549..0000000000000000000000000000000000000000
--- a/Source/core/events/OverflowEvent.h
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * Copyright (C) 2006, 2007, 2008 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
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef OverflowEvent_h
-#define OverflowEvent_h
-
-#include "core/events/Event.h"
-#include "core/events/OverflowEventInit.h"
-
-namespace blink {
-
-class OverflowEvent final : public Event {
-    DEFINE_WRAPPERTYPEINFO();
-public:
-    enum orientType {
-        HORIZONTAL = 0,
-        VERTICAL   = 1,
-        BOTH       = 2
-    };
-
-    static PassRefPtrWillBeRawPtr<OverflowEvent> create()
-    {
-        return adoptRefWillBeNoop(new OverflowEvent);
-    }
-    static PassRefPtrWillBeRawPtr<OverflowEvent> create(bool horizontalOverflowChanged, bool horizontalOverflow, bool verticalOverflowChanged, bool verticalOverflow)
-    {
-        return adoptRefWillBeNoop(new OverflowEvent(horizontalOverflowChanged, horizontalOverflow, verticalOverflowChanged, verticalOverflow));
-    }
-    static PassRefPtrWillBeRawPtr<OverflowEvent> create(const AtomicString& type, const OverflowEventInit& initializer)
-    {
-        return adoptRefWillBeNoop(new OverflowEvent(type, initializer));
-    }
-
-    unsigned short orient() const { return m_orient; }
-    bool horizontalOverflow() const { return m_horizontalOverflow; }
-    bool verticalOverflow() const { return m_verticalOverflow; }
-
-    virtual const AtomicString& interfaceName() const override;
-
-    DECLARE_VIRTUAL_TRACE();
-
-private:
-    OverflowEvent();
-    OverflowEvent(bool horizontalOverflowChanged, bool horizontalOverflow, bool verticalOverflowChanged, bool verticalOverflow);
-    OverflowEvent(const AtomicString&, const OverflowEventInit&);
-
-    unsigned short m_orient;
-    bool m_horizontalOverflow;
-    bool m_verticalOverflow;
-};
-
-} // namespace blink
-
-#endif // OverflowEvent_h