GitLab

We now use nullptr instead of null
https://google.github.io/styleguide/cppguide.html#0_and_nullptr/NULL

Change-Id: If1dfab9f77ca09f3d5a5cbe922646886d7517ec0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2089186
Auto-Submit: Eric Willigers <ericwilligers@chromium.org>
Reviewed-by: Nancy Wang <nancylingwang@chromium.org>
Commit-Queue: Eric Willigers <ericwilligers@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747538}