[Win] Use the default, non-high-res avatar when badging the taskbar.

[Win] Use the default, non-high-res avatar when badging the taskbar.

BUG=374173
TEST=Start Chrome with --new-profile-management. Open and 'Incognito' window.
The taksbar icon should now have a grey background.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=271862

[noms (inactive), 2014-05-20 19:59:41]

Rachel: I can also put this in a function in the profile info cache, but thought
it was a bit of an overkill. Please take a look.

[rpetterson, 2014-05-20 21:47:02]

lgtm

[noms (inactive), 2014-05-20 21:54:34]

The CQ bit was checked by noms@chromium.org

[commit-bot: I haz the power, 2014-05-20 21:55:56]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/noms@chromium.org/286933008/1

[commit-bot: I haz the power, 2014-05-20 23:22:58]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[commit-bot: I haz the power, 2014-05-21 04:32:40]

Change committed as 271862