Revert "Convert away from JSONReader::ReadDeprecated in devtools/"

This reverts commit e31d40d74af30c268b6adc2b5a8762dc5de20821.

Reason for revert: Incorrect check see Bug: 954874

Original change's description:
> Convert away from JSONReader::ReadDeprecated in devtools/
> 
> 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: 925165, 646113
> Change-Id: I37fadaf55cf347c69fdcfa1b53f8f01fed2fd01e
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1550455
> Commit-Queue: Pâris Meuleman <pmeuleman@chromium.org>
> Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
> Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
> Auto-Submit: Pâris Meuleman <pmeuleman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#652085}

TBR=caseq@chromium.org,pfeldman@chromium.org,sdefresne@chromium.org,pmeuleman@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 925165, 646113
Change-Id: Ifd8c91323bc0255ca91632fe4db3914e01ce50d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1578741
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653161}
5 files changed