DevTools: clicking on console filter input brings focus to console prompt
Regressed in r161076

TBR=vsevik

BUG=314331

Review URL: https://codereview.chromium.org/49293005

git-svn-id: svn://svn.chromium.org/blink/trunk@161222 bbb929c8-8fbe-4397-9dbb-9b2b20218538