Deprecate enable-background property

Source/core/svg/SVGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) 2009 Cameron McCormack <cam@mcc.id.au>
  *
  * 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
@@ skipping 292 matching lines @@
             &clip_pathAttr,
             &clip_ruleAttr,
             &SVGNames::colorAttr,
             &color_interpolationAttr,
             &color_interpolation_filtersAttr,
             &color_renderingAttr,
             &cursorAttr,
             &SVGNames::directionAttr,
             &displayAttr,
             &dominant_baselineAttr,
-            &enable_backgroundAttr,
             &fillAttr,
             &fill_opacityAttr,
             &fill_ruleAttr,
             &filterAttr,
             &flood_colorAttr,
             &flood_opacityAttr,
             &font_familyAttr,
             &font_sizeAttr,
             &font_stretchAttr,
             &font_styleAttr,
@@ skipping 842 matching lines @@
     Element::trace(visitor);
 }
 
 const AtomicString& SVGElement::eventParameterName()
 {
     DEFINE_STATIC_LOCAL(const AtomicString, evtString, ("evt", AtomicString::ConstructFromLiteral));
     return evtString;
 }
 
 } // namespace blink