Change panel overflow to not close any open panels.

Change panel overflow to not close any open panels. Extra panels that don't fit on screen are allowed to be opened off-screen. On Linux, the WM may force the overflow panels to remain on-screen using overlapping.

Maximum panel width is no longer affected by the remaining available screen area now that panels are allowed to overflow the available screen area.

BUG=100185
TEST=PanelBrowserTest.CreatePanelOnOverflow


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=106840

[jennb, 2011-10-21 22:18:14]

Linux WM will keep overflow panels on screen and overlap them according to its
whim. Not exactly beautiful, but usable for dogfood.

Sorry to delete your code, Jian. You can get even via code review feedback. ;-)

[jianli, 2011-10-21 22:37:15]

LGTM.

Please also update the description about our change to auto-resizing width
growing algorithm.

http://codereview.chromium.org/8375012/diff/1/chrome/browser/ui/panels/panel_...
File chrome/browser/ui/panels/panel_manager.cc (right):

http://codereview.chromium.org/8375012/diff/1/chrome/browser/ui/panels/panel_...
chrome/browser/ui/panels/panel_manager.cc:328: // * cannot grow to take more
than the available space and go beyond the left
Please update the comment here.

[commit-bot: I haz the power, 2011-10-22 00:33:27]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jennb@chromium.org/8375012/3001

[commit-bot: I haz the power, 2011-10-22 02:23:10]

Change committed as 106840