Gardening: two flaky tests

fast/writing-mode/flipped-blocks-inline-map-local-to-container.html
inspector/elements/styles/styles-should-not-force-sync-style-recalc.html

BUG=369008,369009
TBR=jsbell

Review URL: https://codereview.chromium.org/267683004

git-svn-id: svn://svn.chromium.org/blink/trunk@173071 bbb929c8-8fbe-4397-9dbb-9b2b20218538