Length type Relative is now unused. Remove it.

Source/platform/Length.h

 /*
     Copyright (C) 1999 Lars Knoll (knoll@kde.org)
     Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
     Copyright (C) 2011 Rik Cabanier (cabanier@adobe.com)
     Copyright (C) 2011 Adobe Systems Incorporated. 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.
@@ skipping 18 matching lines @@
 #include "wtf/FastAllocBase.h"
 #include "wtf/Forward.h"
 #include "wtf/HashMap.h"
 #include "wtf/MathExtras.h"
 #include "wtf/Vector.h"
 #include <cstring>
 
 namespace WebCore {
 
 enum LengthType {
-    Auto, Relative, Percent, Fixed,
+    Auto, Percent, Fixed,
     Intrinsic, MinIntrinsic,
     MinContent, MaxContent, FillAvailable, FitContent,
     Calculated,
     ViewportPercentageWidth, ViewportPercentageHeight, ViewportPercentageMin, ViewportPercentageMax,
     ExtendToZoom,
     Undefined
 };
 
 enum ValueRange {
     ValueRangeAll,
@@ skipping 167 matching lines @@
     }
     bool isNegative() const
     {
         if (isUndefined() || isCalculated())
             return false;
 
         return getFloatValue() < 0;
     }
 
     bool isAuto() const { return type() == Auto; }
-    bool isRelative() const { return type() == Relative; }
     bool isPercent() const { return type() == Percent || type() == Calculated; }
     bool isFixed() const { return type() == Fixed; }
     bool isIntrinsicOrAuto() const { return type() == Auto || isLegacyIntrinsic() || isIntrinsic(); }
     bool isLegacyIntrinsic() const { return type() == Intrinsic || type() == MinIntrinsic; }
     bool isIntrinsic() const { return type() == MinContent || type() == MaxContent || type() == FillAvailable || type() == FitContent; }
     bool isSpecified() const { return type() == Fixed || type() == Percent || type() == Calculated || isViewportPercentage(); }
     bool isSpecifiedOrIntrinsic() const { return isSpecified() || isIntrinsic(); }
     bool isCalculated() const { return type() == Calculated; }
     bool isCalculatedEqual(const Length&) const;
     bool isMinContent() const { return type() == MinContent; }
@@ skipping 79 matching lines @@
     bool m_quirk;
     unsigned char m_type;
     bool m_isFloat;
 };
 
 PLATFORM_EXPORT Vector<Length> parseHTMLAreaElementCoords(const String&);
 
 } // namespace WebCore
 
 #endif // Length_h