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
Commit-Queue: Pâris Meuleman <>
Reviewed-by: Andrey Kosyakov <>
Reviewed-by: Sylvain Defresne <>
Auto-Submit: Pâris Meuleman <>
Cr-Commit-Position: refs/heads/master@{#652085}
5 files changed