Reland r154972: "Remove implied Skip."

This patched turned out not to be the cause of the rebaselining bugs.

TBR=dpranke@chromium.org

Review URL: https://codereview.chromium.org/20870002

git-svn-id: svn://svn.chromium.org/blink/trunk@155026 bbb929c8-8fbe-4397-9dbb-9b2b20218538