Remove the compile time flag for DATALIST Element.

Source/core/rendering/RenderThemeChromiumSkia.h

 /*
  * This file is part of the WebKit project.
  *
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
  * Copyright (C) 2007 Holger Hans Peter Freyther
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008, 2009 Google, Inc.
  * All rights reserved.
  *
@@ skipping 147 matching lines @@
 
     private:
         bool m_needsFlipping;
         const PaintInfo& m_paintInfo;
     };
 
 private:
     virtual Color disabledTextColor(const Color& textColor, const Color&) const OVERRIDE { return textColor; }
     virtual bool shouldShowPlaceholderWhenFocused() const OVERRIDE;
 
-#if ENABLE(DATALIST_ELEMENT)
     virtual LayoutUnit sliderTickSnappingThreshold() const OVERRIDE;
-#endif
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
     virtual bool supportsCalendarPicker(const AtomicString& type) const OVERRIDE;
 #endif
 
     int menuListInternalPadding(RenderStyle*, int paddingType) const;
     bool paintMediaButtonInternal(GraphicsContext*, const IntRect&, Image*);
     IntRect convertToPaintingRect(RenderObject* inputRenderer, const RenderObject* partRenderer, LayoutRect partRect, const IntRect& localOffset) const;
 
     static const RGBA32 defaultTapHighlightColor = 0x2e000000; // 18% black.
 };
 
 } // namespace WebCore
 
 #endif // RenderThemeChromiumSkia_h