DevTools: Always show console context selector even in workers.

There is no reason to hide it.

BUG=404355
R=sergeyv

Review URL: https://codereview.chromium.org/500043004

git-svn-id: svn://svn.chromium.org/blink/trunk@180906 bbb929c8-8fbe-4397-9dbb-9b2b20218538