Cleanup: Rename two entries of 'direct_dependent_configs' to 'public_configs'.

Cleanup: Rename two entries of 'direct_dependent_configs' to 'public_configs'.

public_configs is the non-deprecated name of direct_dependent_configs.

BUG=None
TEST=gn gen out-gn
R=brettw@chromium.org

Committed: https://crrev.com/dcbe0bcee17ee96b50496df6f569fc87bcc89a5f
Cr-Commit-Position: refs/heads/master@{#322363}

[brettw, 2015-03-26 03:10:55]

lgtm

[tfarina, 2015-03-26 12:10:25]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2015-03-26 12:10:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1034063002/1

[commit-bot: I haz the power, 2015-03-26 12:14:03]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-26 12:15:00]

Patchset 1 (id:??) landed as
https://crrev.com/dcbe0bcee17ee96b50496df6f569fc87bcc89a5f
Cr-Commit-Position: refs/heads/master@{#322363}