Add PanelOverflowStrip to handle panel overflow.

chrome/browser/ui/panels/panel.h

 // Copyright (c) 2011 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_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_H_
 #pragma once
 
 #include "chrome/browser/ui/browser_window.h"
 
@@ skipping 45 matching lines @@
   // Gets the extension that a panel is created from.
   // Returns NULL if it cannot be found.
   const Extension* GetExtension() const;
 
   void SetExpansionState(ExpansionState new_expansion_state);
 
   bool ShouldBringUpTitlebar(int mouse_x, int mouse_y) const;
 
   bool IsDrawingAttention() const;
 
+  // Ensures that the panel is fully visible, that is, not obscured by other
+  // top-most windows.
+  void EnsureFullyVisible();
+
+  int TitleOnlyHeight() const;
+
+  // Returns the size of the panel when it is iconified, as shown on the
+  // overflow area.
+  gfx::Size IconOnlySize() const;
+
   // BrowserWindow overrides.
   virtual void Show() OVERRIDE;
   virtual void ShowInactive() OVERRIDE;
   virtual void SetBounds(const gfx::Rect& bounds) OVERRIDE;
   virtual void Close() OVERRIDE;
   virtual void Activate() OVERRIDE;
   virtual void Deactivate() OVERRIDE;
   virtual bool IsActive() const OVERRIDE;
   virtual void FlashFrame() OVERRIDE;
   virtual gfx::NativeWindow GetNativeHandle() OVERRIDE;
@@ skipping 205 matching lines @@
   NativePanel* native_panel_;  // Weak, owns us.
 
   ExpansionState expansion_state_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(Panel);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_H_