[chromium] Chromium Linux EWS bots and CQ bots are flaky
https://bugs.webkit.org/show_bug.cgi?id=96041

Unreviewed, trying to get the cr-linux ews into a usable state.

* platform/chromium/TestExpectations: mark 2 http cache tests as flaky

git-svn-id: svn://svn.chromium.org/blink/trunk@127883 bbb929c8-8fbe-4397-9dbb-9b2b20218538