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The following page always errors out inside rasterize_and_record.key_silk_cases
on some windows platforms:
  http://plus.google.com/app/basic/stream

This change disables this page so that the perf bots can pass this test for the
other pages.

BUG=338838
R=dominikg@chromium.org, tonyg@chromium.org

Review URL: https://codereview.chromium.org/167143002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251358 0039d316-1c4b-4281-b951-d872f2087c98