tree e3d2afd31a2af5d7e8faa601cf0c34744ef82914
parent 0e1b88431d63141786394285d1ed5fed972114b0
author Julie Hockett <juliehockett@google.com> 1542392089 -0800
committer Commit Bot <commit-bot@chromium.org> 1544814896 +0000

[metadata] Adding metadata output to gn desc

Converts the metadata scope to a base::DictionaryValue and outputs it as
the 'metadata' key in `gn desc`.

Also does a minor refactoring of desc so that single-value requests are
dispatched to the appropriate handler (no impact on performance or
output, other than allowing the metadata to be printed the same in both
single- and multi-value contexts).

Change-Id: If0beb25cdc0f05e9140e4768891bfbbac444ecc6
Reviewed-on: https://gn-review.googlesource.com/c/3301
Commit-Queue: Julie Hockett <juliehockett@google.com>
Reviewed-by: Brett Wilson <brettw@chromium.org>