GitLab

In order to reduce the number of base::Bind/base::Callback uses added to
the codebase while we are in the process of a migration, we can add a
global PRESUBMIT.py hook to nudge people to use the new interfaces.

Bug: 714018
Test: git cl try
Change-Id: I60741a1532a060fc75f3aeb1533e88abbdf9cfe7
Reviewed-on: https://chromium-review.googlesource.com/794879Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Taiju Tsuiki <tzik@chromium.org>
Commit-Queue: Luis Hector Chavez <lhchavez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520611}