Use JSON content type from CUS.

Bug: 952753
Change-Id: I7443b3e0d6ff228113ef19ef718561ddfacd0f88
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1573658
Commit-Queue: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Sorin Jianu <sorin@chromium.org>
Auto-Submit: Joshua Pawlicki <waffles@chromium.org>
Reviewed-by: Sorin Jianu <sorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652171}
1 file changed