LeakExpectations: add more serviceworker tests

TBR=dmikurube@chromium.org
NOTRY=true
BUG=364390

Review URL: https://codereview.chromium.org/365203003

git-svn-id: svn://svn.chromium.org/blink/trunk@177496 bbb929c8-8fbe-4397-9dbb-9b2b20218538