Add support for the column-fill property.

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 158 matching lines @@
     case CSSValueRight:
         return ReflectionRight;
     default:
         break;
     }
 
     ASSERT_NOT_REACHED();
     return ReflectionBelow;
 }
 
+template<> inline CSSPrimitiveValue::CSSPrimitiveValue(ColumnFill columnFill)
+    : CSSValue(PrimitiveClass)
+{
+    m_primitiveUnitType = CSS_VALUE_ID;
+    switch (columnFill) {
+    case ColumnFillAuto:
+        m_value.valueID = CSSValueAuto;
+        break;
+    case ColumnFillBalance:
+        m_value.valueID = CSSValueBalance;
+        break;
+    }
+}
+
+template<> inline CSSPrimitiveValue::operator ColumnFill() const
+{
+    if (m_primitiveUnitType == CSS_VALUE_ID) {
+        if (m_value.valueID == CSSValueBalance)
+            return ColumnFillBalance;
+        if (m_value.valueID == CSSValueAuto)
+            return ColumnFillAuto;
+    }
+    ASSERT_NOT_REACHED();
+    return ColumnFillBalance;
+}
+
 template<> inline CSSPrimitiveValue::CSSPrimitiveValue(ColumnSpan columnSpan)
     : CSSValue(PrimitiveClass)
 {
     m_primitiveUnitType = CSS_VALUE_ID;
     switch (columnSpan) {
     case ColumnSpanAll:
         m_value.valueID = CSSValueAll;
         break;
     case ColumnSpanNone:
         m_value.valueID = CSSValueNone;
@@ skipping 4663 matching lines @@
         break;
     }
 
     ASSERT_NOT_REACHED();
     return IsolationAuto;
 }
 
 }
 
 #endif