RFR (JAXP) 8135283: DOM API update: Element Traversal Specification

[huizhe wang]

Hi,

Please review the DOM update to include the Element Traversal 
Specification. ElementTraversal is an interface which allows the author 
to restrict navigation to Element nodes.

The implementation is the result of a merge with the upper Xerces 
source. The new methods implementation starts at line 1173 if you want 
to avoid the lot of formatting changes due to a NetBeans Source Format.

https://bugs.openjdk.java.net/browse/JDK-8135283
http://cr.openjdk.java.net/~joehw/jdk9/8135283/webrev/

Thanks,
Joe