Move IN_OVERFLOW from Panel::ExpansionState to new enum.

chrome/browser/ui/panels/panel.h

Index: chrome/browser/ui/panels/panel.h
diff --git a/chrome/browser/ui/panels/panel.h b/chrome/browser/ui/panels/panel.h
index 6a78d4d2cbfae750d31a7b1c9065c32bfb183f5d..2f89aa111e26db487931868aa6d765c2037401b4 100644
--- a/chrome/browser/ui/panels/panel.h
+++ b/chrome/browser/ui/panels/panel.h
@@ -32,16 +32,23 @@ class Panel : public BrowserWindow,
               public TabStripModelObserver,
               public content::NotificationObserver {
  public:
+  enum LayoutState {
+    // The panel is docked to the bottom of the screen.
+    DOCKED,
+    // The panel can appear anywhere on the screen.
+    DETACHED,
+    // The panel is put into the overflow area due to insufficient space in the
+    // docked display area.
+    IN_OVERFLOW
+  };
+
   enum ExpansionState {
-   // The panel is fully expanded with both title-bar and the client-area.
-   EXPANDED,
-   // The panel is shown with the title-bar only.
-   TITLE_ONLY,
-   // The panel is shown with 3-pixel line.
-   MINIMIZED,
-   // The panel is put into the overflow area due to no space available in the
-   // normal display area.
-   IN_OVERFLOW
+    // The panel is fully expanded with both title-bar and the client-area.
+    EXPANDED,
+    // The panel is shown with the title-bar only.
+    TITLE_ONLY,
+    // The panel is shown with 3-pixel line.
+    MINIMIZED
   };
 
   // The panel can be minimized to 4-pixel lines.
@@ -56,6 +63,7 @@ class Panel : public BrowserWindow,
   // Returns NULL if it cannot be found.
   const Extension* GetExtension() const;
 
+  void SetLayoutState(LayoutState new_layout_state);
   void SetExpansionState(ExpansionState new_expansion_state);
 
   bool IsDrawingAttention() const;
@@ -218,8 +226,8 @@ class Panel : public BrowserWindow,
 
   NativePanel* native_panel() { return native_panel_; }
   Browser* browser() const { return browser_; }
+  LayoutState layout_state() const { return layout_state_; }
   ExpansionState expansion_state() const { return expansion_state_; }
-  ExpansionState old_expansion_state() const { return old_expansion_state_; }
   const gfx::Size& min_size() const { return min_size_; }
   const gfx::Size& max_size() const { return max_size_; }
   bool auto_resizable() const { return auto_resizable_; }
@@ -310,8 +318,8 @@ class Panel : public BrowserWindow,
   // PanelBrowserWindowGtk/PanelBrowserView/PanelBrowserWindowCocoa.
   NativePanel* native_panel_;  // Weak, owns us.
 
+  LayoutState layout_state_;
   ExpansionState expansion_state_;
-  ExpansionState old_expansion_state_;
 
   // Indicates whether the panel app icon is visible in the taskbar.
   bool app_icon_visible_;