This reverts commit 3e9eda17.

Reason for revert: Trying again with a fix.

Original change's description:
> Revert "Try again to fix UnicodeDecodeError in CheckAuthorizedAuthor."
>
> This reverts commit dd007670.
>
> Reason for revert: Change wasn't correct.
>
> Original change's description:
> > Try again to fix UnicodeDecodeError in CheckAuthorizedAuthor.
> >
> > This will attempt to do so in a Python2-compatible way.
> >
> > Bug: 1210746
> > Change-Id: I09edc21a5c47106803c0ac5ca449e0f8732efb24
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2906501
> > Auto-Submit: Dirk Pranke <dpranke@google.com>
> > Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
> > Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
>
> Bug: 1210746
> Change-Id: Ia101d73857abe3d65ba48e05e7a0bc98efb2fd37
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2908152
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Commit-Queue: Dirk Pranke <dpranke@google.com>

Bug: 1210746
Change-Id: I6b7b2a24dd5565740a0561c8eeb860d62375d4bd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2908153Reviewed-by: Alan Screen <awscreen@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@google.com>