Uncomment accidentally commented-out TestExpectations after r159524.

TBR=ojan@chromium.org
BUG=24182

Review URL: https://codereview.chromium.org/26749002

git-svn-id: svn://svn.chromium.org/blink/trunk@159255 bbb929c8-8fbe-4397-9dbb-9b2b20218538