Set the startup type to auto in windows setup.

Set the startup type to auto in windows setup.

This is safe to do because the custom action is only executed if the startup type was already auto at the beginning of the installation.

BUG=472887
Committed: https://crrev.com/56cc1c6d0cee4c119d9b41a2a018703a06a5148b
Cr-Commit-Position: refs/heads/master@{#324369}

[weitao, 2015-04-09 00:17:35]

weitaosu@chromium.org changed reviewers:
+ sergeyu@chromium.org

[Jamie, 2015-04-09 00:20:22]

jamiewalch@chromium.org changed reviewers:
+ jamiewalch@chromium.org

[Jamie, 2015-04-09 00:20:22]

lgtm

[Sergey Ulanov, 2015-04-09 01:08:06]

lgtm

[weitao, 2015-04-09 03:49:26]

The CQ bit was checked by weitaosu@chromium.org

[commit-bot: I haz the power, 2015-04-09 03:50:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1071013002/1

[commit-bot: I haz the power, 2015-04-09 04:20:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-09 04:20:58]

Patchset 1 (id:??) landed as
https://crrev.com/56cc1c6d0cee4c119d9b41a2a018703a06a5148b
Cr-Commit-Position: refs/heads/master@{#324369}