Rebaseline virtual/prefer_compositing_to_lcd_text/compositing/overflow/updating-scrolling-container.html

BUG=416535,429126
TBR=morrita@chromium.org

Review URL: https://codereview.chromium.org/689153002

git-svn-id: svn://svn.chromium.org/blink/trunk@184750 bbb929c8-8fbe-4397-9dbb-9b2b20218538