Add runtime feature and property names for unprefixed CSS Transforms

Source/core/svg/SVGElement.cpp

Index: Source/core/svg/SVGElement.cpp
diff --git a/Source/core/svg/SVGElement.cpp b/Source/core/svg/SVGElement.cpp
index d0648dccdef1c8a04f4d95ee009536bf63d10b3a..76cf87009a644ddbb79db1232de8c81080ae5831 100644
--- a/Source/core/svg/SVGElement.cpp
+++ b/Source/core/svg/SVGElement.cpp
@@ -58,9 +58,14 @@ using namespace SVGNames;
 void mapAttributeToCSSProperty(HashMap<StringImpl*, CSSPropertyID>* propertyNameToIdMap, const QualifiedName& attrName)
 {
     // FIXME: when CSS supports "transform-origin" the special case for transform_originAttr can be removed.
+    // FIXME: It's not clear the above is strictly true, as -webkit-transform-origin has non-standard behavior.
     CSSPropertyID propertyId = cssPropertyID(attrName.localName());
     if (!propertyId && attrName == transform_originAttr)
         propertyId = CSSPropertyWebkitTransformOrigin; // cssPropertyID("-webkit-transform-origin")
+    if (propertyId == CSSPropertyTransformOrigin) {
+        ASSERT(RuntimeEnabledFeatures::cssTransformsUnprefixedEnabled());

[no longer working on chromium, 2014/03/26 17:19:24]

This line of code consistently crashes the tab on Linux.

+        propertyId = CSSPropertyWebkitTransformOrigin;
+    }
     ASSERT(propertyId > 0);
     propertyNameToIdMap->set(attrName.localName().impl(), propertyId);
 }