Fix panels being removed from PanelManager prematurely.

chrome/common/chrome_notification_types.h

Index: chrome/common/chrome_notification_types.h
diff --git a/chrome/common/chrome_notification_types.h b/chrome/common/chrome_notification_types.h
index 12477c390bb8bd74d97eddcfdc9c4b9252d78ae4..55d2d36f5a7d4ed818134ca7c92a416e5f90f513 100644
--- a/chrome/common/chrome_notification_types.h
+++ b/chrome/common/chrome_notification_types.h
@@ -942,6 +942,11 @@ enum NotificationType {
   // Used only in unit testing.
   NOTIFICATION_PANEL_CHANGED_EXPANSION_STATE,
 
+  // Sent from the destructor of Panel class.
+  // Source is the panel being deleted. No details.
+  // Used only in unit testing.
+  NOTIFICATION_PANEL_DELETED,

[Dmitry Titov, 2011/11/11 05:18:10]

is this notification used? I see where it is fired but don't see where it is
listened for...

[prasadt, 2011/11/11 18:29:58]

Its listened for in panel_browsertest.cc

+
   // Sent when panel window size is known. This is for platforms where the
   // window creation is async and size of the window only becomes known later.
   // Used only in unit testing.