GitLab

Implement Array/Dictionary scopes that create the container with a
copied name. This provides an auto-closing equivalent to
|TracedValue::Begin{Dictionary,Array}[WithCopiedName]| API.

Bug: 1043616
Change-Id: I26640d39f8dcd65c049f0f961c95782b5c21d089
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2374208
Commit-Queue: Karel Král <karelkral@google.com>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Reviewed-by: Eric Seckler <eseckler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802186}