Bump docserver to 3-48-0.

Bump docserver to 3-48-0.

Also adjusts cron runtime to 180 minutes. It's been at 240 on the
live instance for a while but was never committed that way.

Refresh cycles are taking less time now, so dropping down to 180.

R=kalman@chromium.org
NOTRY=True
BUG=None

Committed: https://crrev.com/0e37603ee050915c74e5466eb9773d92c6109606
Cr-Commit-Position: refs/heads/master@{#319156}

[not at google - send to devlin, 2015-03-04 23:10:10]

lgtm

Thanks for doing this. Taking notes.

[Ken Rockot(use gerrit already), 2015-03-04 23:11:03]

The CQ bit was checked by rockot@chromium.org

[commit-bot: I haz the power, 2015-03-04 23:12:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/977213002/1

[commit-bot: I haz the power, 2015-03-04 23:13:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-04 23:14:18]

Patchset 1 (id:??) landed as
https://crrev.com/0e37603ee050915c74e5466eb9773d92c6109606
Cr-Commit-Position: refs/heads/master@{#319156}