Refine acid3 failure expectation as it only fails on Windows.
Refine acid3 failure expectation as it only fails on Windows.

TBR=jochen@chromium.org

Review URL: https://codereview.chromium.org/22764005

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@155915 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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