Parent elements should not scroll when scrolling the listbox to show the selection

TEST=Added listbox-scroll-to-selection.html
BUG=423256

Review URL: https://codereview.chromium.org/656913003

git-svn-id: svn://svn.chromium.org/blink/trunk@184426 bbb929c8-8fbe-4397-9dbb-9b2b20218538