Some fetch tests are flaky on Windows XP.
Some fetch tests are flaky on Windows XP.

BUG=458456
TBR=hiroshige@chromium.org

Review URL: https://codereview.chromium.org/921133002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@190125 bbb929c8-8fbe-4397-9dbb-9b2b20218538

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk