Support 'paint-order' from SVG2.

Source/core/css/CSSPrimitiveValueMappings.h

 /*
  * Copyright (C) 2007 Alexey Proskuryakov <ap@nypop.com>.
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ skipping 4494 matching lines @@
     case CSSValueNone:
         return VE_NONE;
     case CSSValueNonScalingStroke:
         return VE_NON_SCALING_STROKE;
     }
 
     ASSERT_NOT_REACHED();
     return VE_NONE;
 }
 
+template<> inline CSSPrimitiveValue::CSSPrimitiveValue(EPaintOrder e)
+    : CSSValue(PrimitiveClass)
+{
+    m_primitiveUnitType = CSS_IDENT;
+    switch (e) {
+    case PO_NORMAL:
+        m_value.ident = CSSValueNormal;
+        break;
+    case PO_FILL:
+        m_value.ident = CSSValueFill;
+        break;
+    case PO_STROKE:
+        m_value.ident = CSSValueStroke;
+        break;
+    case PO_MARKERS:
+        m_value.ident = CSSValueMarkers;
+        break;
+    default:
+        ASSERT_NOT_REACHED();
+        m_value.ident = CSSValueNormal;
+        break;
+    }
+}
+
+template<> inline CSSPrimitiveValue::operator EPaintOrder() const
+{
+    switch (m_value.ident) {
+    case CSSValueNormal:
+        return PO_NORMAL;
+    case CSSValueFill:
+        return PO_FILL;
+    case CSSValueStroke:
+        return PO_STROKE;
+    case CSSValueMarkers:
+        return PO_MARKERS;
+    }
+
+    ASSERT_NOT_REACHED();
+    return PO_NORMAL;
+}
+
 template<> inline CSSPrimitiveValue::CSSPrimitiveValue(EMaskType e)
     : CSSValue(PrimitiveClass)
 {
     m_primitiveUnitType = CSS_IDENT;
     switch (e) {
     case MT_LUMINANCE:
         m_value.ident = CSSValueLuminance;
         break;
     case MT_ALPHA:
         m_value.ident = CSSValueAlpha;
@@ skipping 61 matching lines @@
 
     ASSERT_NOT_REACHED();
     return OriginTopLeft;
 }
 
 #endif // ENABLE(CSS_IMAGE_ORIENTATION)
 
 }
 
 #endif