Move IN_OVERFLOW from Panel::ExpansionState to new enum.

chrome/common/chrome_notification_types.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_
 #define CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_
 #pragma once
 
 #include "content/public/browser/notification_types.h"
 
@@ skipping 948 matching lines @@
   // of the screen.
   // Sent when all nonblocking bounds animations are finished across panels.
   // Used only in unit testing.
   NOTIFICATION_PANEL_BOUNDS_ANIMATIONS_FINISHED,
 
   // Sent when panel gains/loses focus.
   // The source is the Panel, no details.
   // Used only in unit testing.
   NOTIFICATION_PANEL_CHANGED_ACTIVE_STATUS,
 
+  // Sent when panel is moved between different strips.
+  // The source is the Panel, no details.
+  // Used only in unit testing.
+  NOTIFICATION_PANEL_CHANGED_STRIP_OWNER,
+
   // Sent when panel is minimized/restored/shows title only etc.
   // The source is the Panel, no details.
   // Used only in unit testing.
   NOTIFICATION_PANEL_CHANGED_EXPANSION_STATE,
 
   // 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.
   NOTIFICATION_PANEL_WINDOW_SIZE_KNOWN,
 
@@ skipping 31 matching lines @@
   // Currently only Content and Chrome define and use notifications.
   // Custom notifications not belonging to Content and Chrome should start
   // from here.
   NOTIFICATION_CHROME_END,
 };
 
 }  // namespace chrome
 
 
 #endif  // CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_