NEW133912
Dictionary with attribute set to 'undefined' counts as set but shouldn't 
https://bugs.webkit.org/show_bug.cgi?id=133912
Summary Dictionary with attribute set to 'undefined' counts as set but shouldn't
Dirk Schulze
Reported 2014-06-14 14:01:35 PDT
If an object has something like { x: undefined }, then the attribute x should count as unset. Instead it is set and can lead to wrong results. Example: DOMPoint({x: undefined}) shouldn't set DOMPoint.x (so that it defaults to 0). With the bug, DOMPoint.x gets set to NaN. (Undefined on number -> NaN.)
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