Suppress virtual/softwarecompositing/geometry/layer-due-to-layer-children-deep-switch.html failure on buildbots

Add the LayoutTest to LeakExpectations to make the waterfall green.

BUG=366029
NOTRY=true

Review URL: https://codereview.chromium.org/248103006

git-svn-id: svn://svn.chromium.org/blink/trunk@172343 bbb929c8-8fbe-4397-9dbb-9b2b20218538