Use base::JSONReader::ReadDeprecated() in various [h-z]* directories.

This is part of the process to help migrate base::JSONReader::Read() to
return base::Optional<base::Value>.

Do the same for ReadAndReturnError() and ReadToValue().

BUG=925165
TBR=eroman@chromium.org,pfeldman@chromium.org,sandersd@chromium.org,sergeyu@chromium.org,thakis@chromium.org

Change-Id: I0550baa36f24e6b27a4479543e55c8734c3c6956
Reviewed-on: https://chromium-review.googlesource.com/c/1476099
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#632889}
35 files changed