Fix typo in options2 browser_options.js

Fix typo in options2 browser_options.js

This will properly disable "Disconnect my account..." button on
ChromeOS.

cr.isChromeOs (note the last small "s", not capital "S")
returned "undefined" and thus "Disconnect..." button's
hidden attribute was always false (i.e. visible on ChromeOS).

BUG=116342
TEST=manually open chrome://settings with signed-in account and see
"Disconnect your google account" button won't appear.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=126842

[kochi, 2012-03-14 23:49:51]

Hi James,

Could you review this?

[James Hawkins, 2012-03-14 23:51:16]

lgtm

[commit-bot: I haz the power, 2012-03-14 23:56:40]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/kochi@chromium.org/9702051/1

[commit-bot: I haz the power, 2012-03-15 02:53:41]

The commit queue went berserk retrying too often for a
seemingly flaky test. Builder is win, revision is 126789, job name
was 9702051-1 (previous was lost) (previous was lost) (retry) (previous was
lost).

[commit-bot: I haz the power, 2012-03-15 03:41:02]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/kochi@chromium.org/9702051/1