Additional JSON experiment cleanups.

Bug: 881076
Change-Id: Id23c8d573e8e6450640e355cbe49d104bba4ae50
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1564551
Auto-Submit: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Steven Holte <holte@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#650371}
2 files changed