Add HeapListHashSet, reland of https://codereview.chromium.org/256143002/

R=ager@chromium.org, mikhail.pozdnyakov@intel.com, wibling@chromium.org, zerny@chromium.org
BUG=

Review URL: https://codereview.chromium.org/269013003

git-svn-id: svn://svn.chromium.org/blink/trunk@173313 bbb929c8-8fbe-4397-9dbb-9b2b20218538