Switch HTMLTableRowsCollection from Traversal<> to iterators
https://bugs.webkit.org/show_bug.cgi?id=126684

Reviewed by Andreas Kling.

This is the last remaining client of Traversal<> outside the iterator implementation.

* dom/ElementChildIterator.h:
(WebCore::ElementChildIteratorAdapter<ElementType>::find):
(WebCore::ElementChildConstIteratorAdapter<ElementType>::find):
        
    Add find with the same semantics as ElementDescendantIterator::find.

* html/HTMLTableRowsCollection.cpp:
(WebCore::HTMLTableRowsCollection::rowAfter):
(WebCore::HTMLTableRowsCollection::lastRow):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@161551 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Move myself to the committers list.

Unreviewed.

* Scripts/webkitpy/common/config/contributors.json:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@161552 268f45cc-cd09-0410-ab3c-d52691b4dbfc