Support unknown property strings in transition-property

Source/core/css/CSSComputedStyleDeclaration.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
@@ skipping 919 matching lines @@
         list->append(cssValuePool().createIdentifierValue(CSSValueSpan));
         list->append(cssValuePool().createValue(position.spanPosition(), CSSPrimitiveValue::CSS_NUMBER));
     } else
         list->append(cssValuePool().createValue(position.integerPosition(), CSSPrimitiveValue::CSS_NUMBER));
 
     if (!position.namedGridLine().isNull())
         list->append(cssValuePool().createValue(position.namedGridLine(), CSSPrimitiveValue::CSS_STRING));
     return list;
 }
 
-static PassRefPtrWillBeRawPtr<CSSValue> createTransitionPropertyValue(CSSTransitionData::TransitionProperty property)
+static PassRefPtrWillBeRawPtr<CSSValue> createTransitionPropertyValue(const CSSTransitionData::TransitionProperty& property)
 {
     if (property.propertyType == CSSTransitionData::TransitionNone)
         return cssValuePool().createIdentifierValue(CSSValueNone);
     if (property.propertyType == CSSTransitionData::TransitionAll)
         return cssValuePool().createIdentifierValue(CSSValueAll);
+    if (property.propertyType == CSSTransitionData::TransitionUnknown)
+        return cssValuePool().createValue(property.propertyString, CSSPrimitiveValue::CSS_STRING);
     ASSERT(property.propertyType == CSSTransitionData::TransitionSingleProperty);
     return cssValuePool().createValue(getPropertyNameString(property.propertyId), CSSPrimitiveValue::CSS_STRING);
 }
 
 static PassRefPtrWillBeRawPtr<CSSValue> valueForTransitionProperty(const CSSTransitionData* transitionData)
 {
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
     if (transitionData) {
         for (size_t i = 0; i < transitionData->propertyList().size(); ++i)
             list->append(createTransitionPropertyValue(transitionData->propertyList()[i]));
@@ skipping 2104 matching lines @@
     return list.release();
 }
 
 void CSSComputedStyleDeclaration::trace(Visitor* visitor)
 {
     visitor->trace(m_node);
     CSSStyleDeclaration::trace(visitor);
 }
 
 } // namespace WebCore