Extensions: make error console enabled if profile is in dev mode

Bug: 863145
Cq-Include-Trybots: luci.chromium.try:closure_compilation
Change-Id: Ia8b82930d525b9ba3eee1e3332da1d5e35809131
Reviewed-on: https://chromium-review.googlesource.com/1141220
Commit-Queue: Esmael El-Moslimany <aee@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576356}
4 files changed