CSS systemcolors should work in svg properties using <color>.

Source/core/css/SVGCSSParser.cpp

 /*
     Copyright (C) 2008 Eric Seidel <eric@webkit.org>
     Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
                   2004, 2005, 2007, 2010 Rob Buis <buis@kde.org>
     Copyright (C) 2005, 2006 Apple Computer, Inc.
 
     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 "CSSPropertyNames.h"
 #include "CSSValueKeywords.h"
 #include "CSSValueList.h"
 #include "RenderTheme.h"
 #include "SVGPaint.h"
 
 using namespace std;
 
 namespace WebCore {
 
+static bool isSystemColor(int id)
+{
+    return (id >= CSSValueActiveborder && id <= CSSValueWindowtext) || id == CSSValueMenu;
+}
+
 bool CSSParser::parseSVGValue(CSSPropertyID propId, bool important)
 {
     CSSParserValue* value = m_valueList->current();
     if (!value)
         return false;
 
     int id = value->id;
 
     bool valid_primitive = false;
     RefPtr<CSSValue> parsedValue;
@@ skipping 129 matching lines @@
         }
         break;
 
     case CSSPropertyFill:                 // <paint> | inherit
     case CSSPropertyStroke:               // <paint> | inherit
         {
             if (id == CSSValueNone)
                 parsedValue = SVGPaint::createNone();
             else if (id == CSSValueCurrentcolor)
                 parsedValue = SVGPaint::createCurrentColor();
-            else if ((id >= CSSValueActiveborder && id <= CSSValueWindowtext) || id == CSSValueMenu)
+            else if (isSystemColor(id))
                 parsedValue = SVGPaint::createColor(RenderTheme::defaultTheme()->systemColor(id));
             else if (value->unit == CSSPrimitiveValue::CSS_URI) {
                 RGBA32 c = Color::transparent;
                 if (m_valueList->next()) {
                     if (parseColorFromValue(m_valueList->current(), c))
                         parsedValue = SVGPaint::createURIAndColor(value->string, c);
                     else if (m_valueList->current()->id == CSSValueNone)
                         parsedValue = SVGPaint::createURIAndNone(value->string);
                 }
                 if (!parsedValue)
                     parsedValue = SVGPaint::createURI(value->string);
             } else
                 parsedValue = parseSVGPaint();
 
             if (parsedValue)
                 m_valueList->next();
         }
         break;
 
     case CSSPropertyStopColor: // TODO : icccolor
     case CSSPropertyFloodColor:
     case CSSPropertyLightingColor:
-        if ((id >= CSSValueAqua && id <= CSSValueWindowtext) ||
-           (id >= CSSValueAliceblue && id <= CSSValueYellowgreen))
+        if (isSystemColor(id))
+            parsedValue = SVGColor::createFromColor(RenderTheme::defaultTheme()->systemColor(id));
+        else if ((id >= CSSValueAqua && id <= CSSValueTransparent) ||
+                (id >= CSSValueAliceblue && id <= CSSValueYellowgreen) || id == CSSValueGrey)
             parsedValue = SVGColor::createFromString(value->string);
         else if (id == CSSValueCurrentcolor)
             parsedValue = SVGColor::createCurrentColor();
         else // TODO : svgcolor (iccColor)
             parsedValue = parseSVGColor();
 
         if (parsedValue)
             m_valueList->next();
 
         break;
@@ skipping 138 matching lines @@
 {
     RGBA32 c = Color::transparent;
     if (!parseColorFromValue(m_valueList->current(), c))
         return 0;
     return SVGColor::createFromColor(Color(c));
 }
 
 }
 
 #endif // ENABLE(SVG)