Remove useragent-in-openinghandshake from TestExpectation

This CL fixed the failure.
https://codereview.chromium.org/319083003/

BUG=347109
R=ricea

Review URL: https://codereview.chromium.org/319873004

git-svn-id: svn://svn.chromium.org/blink/trunk@175766 bbb929c8-8fbe-4397-9dbb-9b2b20218538