Temporarily mark ServiceWorker's unregister.html as pass/fail
Temporarily mark ServiceWorker's unregister.html as pass/fail

Pending Chromium-side change crrev.com/247773004 alters the handling
of a "not found" unregistration from reject to resolve to match the
spec. Ignore test failures so that can land, then we'll update the test.

BUG=365926
NOTRY=true
TBR=michaeln@chromium.org

Review URL: https://codereview.chromium.org/246383005

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@172294 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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