DevTools: Use correct originURL for pretty-printed scripts.

BUG=402245
R=sergeyv, lushnikov

Review URL: https://codereview.chromium.org/537503002

git-svn-id: svn://svn.chromium.org/blink/trunk@182902 bbb929c8-8fbe-4397-9dbb-9b2b20218538