LayoutTests/websocket/tests/workers/worker-simple.html will fail on Chromium's Linux perf bot as soon as I roll WebKit's version forward: http://build.chromium.org/buildbot/waterfall.fyi/builders/Linux%20Perf%20%28webkit.org%29/builds/10280/steps/ui_tests/logs/WorkerWebSocketLayoutTests
Adding it to test_expectations.txt.
The change to LayoutTests/platform/chromium/test_expectations.txt was landed in r57362.
My bad, nothing needs to be done in WebKit. The worker-simple.html and shared-worker-simple.html tests fail only as part of the ui_tests suite on the Linux perf bot. Will open a bug for that in Chromium's bug tracker, and will revert the changes to test-expectations.txt.