Adding configuration protos

Adding configuration protos. We probably want to handle most of these eventually, and some of them (i.e. token length) pretty soon. Adding them now will make it easier later.

Committed: https://crrev.com/f8ef801fa5e59cdc259b04b83174d99be2b23125
Cr-Commit-Position: refs/heads/master@{#308123}

[Charlie, 2014-12-12 05:49:03]

ckehoe@chromium.org changed reviewers:
+ rkc@chromium.org

[rkc, 2014-12-12 16:42:32]

lgtm

[rkc, 2014-12-12 16:42:36]

The CQ bit was checked by rkc@chromium.org

[commit-bot: I haz the power, 2014-12-12 16:43:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/799793002/1

[commit-bot: I haz the power, 2014-12-12 18:25:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-12 18:26:12]

Patchset 1 (id:??) landed as
https://crrev.com/f8ef801fa5e59cdc259b04b83174d99be2b23125
Cr-Commit-Position: refs/heads/master@{#308123}