Manually rebaseline filter-occlusion-blur-large.

I marked this for manual rebaseline in r154172 due to multi-expectations.
Rebaseline it and bring back the original "Slow" expectation.

TBR=ojan@chromium.org
BUG=259141
NOTRY=true

Review URL: https://codereview.chromium.org/19431002

git-svn-id: svn://svn.chromium.org/blink/trunk@154343 bbb929c8-8fbe-4397-9dbb-9b2b20218538