Act on the incognito enabled policy change and set the menu accordingly.

Act on the incognito enabled policy change and set the menu accordingly.

BUG=80494
TEST=Set the Disable Incognito Enterprise policy to disabled. Make sure it takes effect on the client without having to restart.
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=88530

[Finnur, 2011-06-09 12:24:22]

Scott, can you give a green light on this as owner after pastarmovj approves of
the CL?

[pastarmovj, 2011-06-09 12:27:34]

LGTM pending mac bot happiness (running this CL through a Chromium bot might be
useful too). Thanks for fixing that!

@sky: FYI I verified that it works on Win and Linux manually.

[Finnur, 2011-06-09 14:03:22]

Ran it through the chromeos bot as well and they are all green. 

Scott, whenever you are ready. :)

[sky, 2011-06-09 14:57:27]

LGTM