Update test expectations for animated GIF tests for flakiness after r192643.
Update test expectations for animated GIF tests for flakiness after r192643.

BUG=471177
TBR=pkasting@chromium.org

Review URL: https://codereview.chromium.org/1040663002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@192663 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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