Re-land: Convert the utility process JSON parser into a Mojo service.

Original change: https://codereview.chromium.org/1861573002

This change is idential to the original.

BUG=597124
TBR=bauerb@chromium.org,sdefresne@chromium.org,tsepez@chromium.org,thakis@chromium.org

Review-Url: https://codereview.chromium.org/1948303002
Cr-Commit-Position: refs/heads/master@{#392867}
23 files changed