[uber page] Update web-ui font settings

[uber page] Update web-ui font settings.

- Use 'Open Sans' on desktop versions.
- Windows: Fallback to 'Segoe UI' on Vista, or Arial on XP.
- Adopt shared webui font settings for uber page.

BUG=100885, 112905
TEST=Manual inspection of fonts for webui.
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=120666

[csilv, 2012-02-04 02:16:59]

+estade for review

This CL effectively bumps up the uber page font size slightly (12px -> 13px)
from the mock, but matching what our web-ui currently uses.  I have asked Glen
for confirmation as to whether he really wants to make the default font
smaller... if he does, I will make that change.

[csilv, 2012-02-06 19:12:49]

On 2012/02/04 02:16:59, csilv wrote:
> +estade for review
> 
> This CL effectively bumps up the uber page font size slightly (12px -> 13px)
> from the mock, but matching what our web-ui currently uses.  I have asked Glen
> for confirmation as to whether he really wants to make the default font
> smaller... if he does, I will make that change.

FYI, Glen confirmed that he wants to change the font to 12px, so I'll be
updating this shortly.

[Evan Stade, 2012-02-06 19:57:46]

this is great

[csilv, 2012-02-06 21:40:38]

changed default web-ui font-size to 12px (ie, 75%) per Glen.

FYI, specifying the body font as a percentage value, while using em for more
specific properties seems to be the recommended approach:

http://www.alistapart.com/articles/elastic/
http://kyleschaeffer.com/best-practices/css-font-size-em-vs-px-vs-pt-vs/
http://blog.typekit.com/2011/11/09/type-study-sizing-the-legible-letter/

[Evan Stade, 2012-02-06 22:22:13]

lgtm