Timeout expectation for serviceworker/fetch-mixed-content.html
Timeout expectation for serviceworker/fetch-mixed-content.html

Timing out following chromium r300644, but this looks like a test-only
failure due to invalid cert in the localhost HTTPS server.

BUG=426047
TBR=aboxhall@chromium.org,horo@chromium.org

Review URL: https://codereview.chromium.org/668773003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@184199 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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