Revert of Mojo: Convert scoped_ptr<...>() to nullptr in mojo/embedder. (patchset #1 id:1 of https://codereview.chromium.org/
606143003/)
Reason for revert:
scoped_ptr nullptr support was reverted.
Original issue's description:
> Mojo: Convert scoped_ptr<...>() to nullptr in mojo/embedder.
>
> R=jamesr@chromium.org
>
> Committed: https://crrev.com/
1b198fa11edbe68701e12c27d5f4981398f5ca71
> Cr-Commit-Position: refs/heads/master@{#297093}
TBR=jamesr@chromium.org,viettrungluu@chromium.org
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/
593313006
Cr-Commit-Position: refs/heads/master@{#297109}