DevTools: allow showing views above and below the Sources sidebar.

Change-Id: I76a8edbc45bd6e2d775b48c8f93e288d82bed817
Reviewed-on: https://chromium-review.googlesource.com/c/1357513
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Pavel Feldman <pfeldman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612830}
3 files changed