Avoid trying to layout the desktop when its size is set to 0x0 when minimized on Windows.

Grab-bag:

. Avoid trying to layout the desktop when its size is set to 0x0 when minimized on Windows.
. Don't show the "Default Browser" UI in Aura either.
. Don't flash the active window inactive briefly when clicking on launcher items.

BUG=none
TEST=none
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=109966

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=110116

[sky, 2011-11-14 21:12:21]

http://codereview.chromium.org/8565015/diff/1/ui/aura/desktop.cc
File ui/aura/desktop.cc (right):

http://codereview.chromium.org/8565015/diff/1/ui/aura/desktop.cc#newcode326
ui/aura/desktop.cc:326: if (!window)
Don't we use this to clear the active window? Say you close the last active
window? Or you close the active window and no one else wants active status.

[sky, 2011-11-14 22:16:11]

Ben clarified we explicitly set active_window_ to NULL when deleted, so LGTM

[commit-bot: I haz the power, 2011-11-15 16:45:22]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ben@chromium.org/8565015/7001

[commit-bot: I haz the power, 2011-11-15 18:07:51]

Change committed as 110116