Move IN_OVERFLOW from Panel::ExpansionState to new enum.

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 d508a435f9f710c96d3621a99393d46dc93374a2..758dfdee98bde64f076c66a42041e0d6ab590aa4 100644
--- a/chrome/common/chrome_notification_types.h
+++ b/chrome/common/chrome_notification_types.h
@@ -966,6 +966,11 @@ enum NotificationType {
   // Used only in unit testing.
   NOTIFICATION_PANEL_CHANGED_ACTIVE_STATUS,
 
+  // Sent when panel is switched between different layout states.
+  // The source is the Panel, no details.
+  // Used only in unit testing.
+  NOTIFICATION_PANEL_CHANGED_LAYOUT_STATE,

[prasadt, 2012/01/20 04:43:08]

Not in alphabetical order.

[jianli, 2012/01/20 23:33:08]

I do not think there is a requirement for this. I rather put notification for
layout state change before expansion state change since the former one takes
higher priority.

+
   // Sent when panel is minimized/restored/shows title only etc.
   // The source is the Panel, no details.
   // Used only in unit testing.