This updates the V8 side MB fork with all upstream changes until:
https://chromium.googlesource.com/chromium/src/+/f4d92a15f/tools/mb/mb.py
This includes a required feature for mapping isolate targets to
runtime deps.
Bug: chromium:669910
Change-Id: I22244455b22737cfbfc45adef93581ef44cf4151
Reviewed-on: https://chromium-review.googlesource.com/778879
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49487}
This prepares deletion of MB on the Chromium side.
This runs validation of the v8 configs as presubmit and
removes some obsolete code that required chromium.
BUG=chromium:616035
Review-Url: https://codereview.chromium.org/2299953002
Cr-Commit-Position: refs/heads/master@{#39082}