TargetedStyleRecalc back to stable on M36 now that M35 merge is done.

BUG=366788

Review URL: https://codereview.chromium.org/266713005

git-svn-id: svn://svn.chromium.org/blink/trunk@173146 bbb929c8-8fbe-4397-9dbb-9b2b20218538