Adjust fonts (part of 137349): use standard font sizes in AvatarMenuBubble

Adjust fonts (part of 137349): use standard font sizes in

chrome/browser/ui/views/avatar_menu_bubble_view.cc

This is for Chrome on Windows.

Part of work to use standard font sizes instead of "DeriveFont +/- N Pixels". 
Changed UIs were seen and blessed by sgabriel@ and kuscher@.

The code now uses standard fonts: base and small. Base is used for the names. The resulting change is:
Old: 13 pixels (bold for active, non-bold otherwise)
New: 12 pixels (... same bolding)
For the emails the font size did not change, since the std SmallFont was recently changed from 10 to 11 pixels.

Please see crbug.com/169039 for before and after screenshots

BUG=169039, 137349
TEST=manual
Bring up Chrome on windows; click on avatar in top bar.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=175932

[sschmitz, 2013-01-09 19:10:48]

I hope this is the last CL of the "Adjust font" series. This is very similar to
crbug.com/166679 and its review:
https://codereview.chromium.org/11698005/
This came late because it is Windows (and I was waiting for PM/designers to
return to view the compare/after).

[sky, 2013-01-09 20:40:25]

LGTM

[commit-bot: I haz the power, 2013-01-09 21:15:54]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sschmitz@chromium.org/11819035/1

[commit-bot: I haz the power, 2013-01-10 00:03:34]

Change committed as 175932