GitLab

Use the new JSONReader::Read API that use the new API of
base::Value (move semantic) and convert the surrounding
code to the new API at the same time.

Bug: 646113, 925165
Change-Id: I6d0a9e4d1f2131b756eb55fceb192153541695f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1677846Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Commit-Queue: Sungguk Lim <limasdf@gmail.com>
Cr-Commit-Position: refs/heads/master@{#672628}