Bug 880997 part 1.  Move GetEnumAttr up to Element so I can use it in SVG code.  r=smag
Bug 880997 part 2.  Fix reflect.js to be more strict when examining the value of the IDL attribute for enumerated reflection (e.g. to differentiate between null and empty string) and to allow flagging enumerated reflection as allowing null as a value.
Bug 880997 part 3.  Change crossOrigin reflection to allow null values and be a limited enumerated attribute.  r=smaug
Bug 1017425.  Make the "performance" attribute of Window [StoreInSlot].  r=peterv