Remove -webkit-line-box-contain implementation.

Source/core/css/CSSLineBoxContainValue.h

-/*
- * Copyright (C) 2011 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 CSSLineBoxContainValue_h
-#define CSSLineBoxContainValue_h
-
-#include "core/css/CSSValue.h"
-#include "wtf/PassRefPtr.h"
-
-namespace blink {
-
-enum LineBoxContainFlags { LineBoxContainNone = 0x0, LineBoxContainBlock = 0x1, LineBoxContainInline = 0x2, LineBoxContainFont = 0x4, LineBoxContainGlyphs = 0x8,
-                           LineBoxContainReplaced = 0x10, LineBoxContainInlineBox = 0x20 };
-typedef unsigned LineBoxContain;
-
-// Used for text-CSSLineBoxContain and box-CSSLineBoxContain
-class CSSLineBoxContainValue : public CSSValue {
-public:
-    static PassRefPtrWillBeRawPtr<CSSLineBoxContainValue> create(LineBoxContain value)
-    {
-        return adoptRefWillBeNoop(new CSSLineBoxContainValue(value));
-    }
-
-    String customCSSText() const;
-    bool equals(const CSSLineBoxContainValue& other) const { return m_value == other.m_value; }
-    LineBoxContain value() const { return m_value; }
-
-    DEFINE_INLINE_TRACE_AFTER_DISPATCH() { CSSValue::traceAfterDispatch(visitor); }
-
-private:
-    LineBoxContain m_value;
-
-private:
-    explicit CSSLineBoxContainValue(LineBoxContain);
-};
-
-DEFINE_CSS_VALUE_TYPE_CASTS(CSSLineBoxContainValue, isLineBoxContainValue());
-
-} // namespace
-
-#endif