Move IN_OVERFLOW from Panel::ExpansionState to new enum.

chrome/browser/ui/panels/panel_manager.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_BROWSER_UI_PANELS_PANEL_MANAGER_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_MANAGER_H_
 #pragma once
 
 #include <vector>
 #include "base/basictypes.h"
@@ skipping 29 matching lines @@
   void RemoveAll();
 
   // Asynchronous confirmation of panel having been removed.
   void OnPanelRemoved(Panel* panel);
 
   // Drags the given panel.
   void StartDragging(Panel* panel);
   void Drag(int delta_x);
   void EndDragging(bool cancelled);
 
+  // Invoked when a panel's layout state changes.
+  void OnPanelLayoutStateChanged(Panel* panel, Panel::LayoutState old_state);
+
   // Invoked when a panel's expansion state changes.
-  void OnPanelExpansionStateChanged(Panel* panel);
+  void OnPanelExpansionStateChanged(Panel* panel,
+                                    Panel::ExpansionState old_state);
 
   // Invoked when a panel is starting/stopping drawing an attention.
   void OnPanelAttentionStateChanged(Panel* panel);
 
   // Invoked when the preferred window size of the given panel might need to
   // get changed.
   void OnPreferredWindowSizeChanged(
       Panel* panel, const gfx::Size& preferred_window_size);
 
   // Resizes the panel. Explicitly setting the panel size is not allowed
@@ skipping 128 matching lines @@
   // Timer used to track if the current active app is in full screen mode.
   base::RepeatingTimer<PanelManager> full_screen_mode_timer_;
 
   // True if current active app is in full screen mode.
   bool is_full_screen_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelManager);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_MANAGER_H_