Only collect information about primary display adapter on XP.

Only collect information about primary display adapter on XP.

This is much faster and the extra information wasn't useful anyway.

BUG=456178
Committed: https://crrev.com/6a723d79c949f9ab359966c4e6d37139a096bdc0
Cr-Commit-Position: refs/heads/master@{#316240}

[jbauman, 2015-02-13 02:25:43]

jbauman@chromium.org changed reviewers:
+ zmo@chromium.org

[Zhenyao Mo, 2015-02-13 05:07:59]

On 2015/02/13 02:25:43, jbauman wrote:

LGTM

[jbauman, 2015-02-13 17:34:51]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2015-02-13 17:35:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/920263002/1

[commit-bot: I haz the power, 2015-02-13 17:58:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-13 17:59:17]

Patchset 1 (id:??) landed as
https://crrev.com/6a723d79c949f9ab359966c4e6d37139a096bdc0
Cr-Commit-Position: refs/heads/master@{#316240}