The test got updated to be marked as flaky, so update the pattern to match without or without a prefix.
The test got updated to be marked as flaky, so update the pattern to match without or without a prefix.

BUG=45562
TEST=none
Review URL: http://codereview.chromium.org/2719002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@49167 0039d316-1c4b-4281-b951-d872f2087c98

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