Update Panel mininimize/restore button on strip and expansion state change.

chrome/browser/ui/panels/panel_browser_window_cocoa.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_BROWSER_WINDOW_COCOA_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_BROWSER_WINDOW_COCOA_H_
 
 #import <Foundation/Foundation.h>
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 44 matching lines @@
   virtual bool IsDrawingAttention() const OVERRIDE;
   virtual bool PreHandlePanelKeyboardEvent(
       const NativeWebKeyboardEvent& event,
       bool* is_keyboard_shortcut) OVERRIDE;
   virtual void HandlePanelKeyboardEvent(
       const NativeWebKeyboardEvent& event) OVERRIDE;
   virtual void FullScreenModeChanged(bool is_full_screen) OVERRIDE;
   virtual Browser* GetPanelBrowser() const OVERRIDE;
   virtual void DestroyPanelBrowser() OVERRIDE;
   virtual void EnsurePanelFullyVisible() OVERRIDE;
-  virtual void SetPanelAppIconVisibility(bool visible) OVERRIDE;
   virtual void SetPanelAlwaysOnTop(bool on_top) OVERRIDE;
   virtual void EnableResizeByMouse(bool enable) OVERRIDE;
+  virtual void UpdatePanelMinimizeRestoreButtonVisibility() OVERRIDE;
 
   // These sizes are in screen coordinates.
   virtual gfx::Size WindowSizeFromContentSize(
       const gfx::Size& content_size) const OVERRIDE;
   virtual gfx::Size ContentSizeFromWindowSize(
       const gfx::Size& window_size) const OVERRIDE;
   virtual int TitleOnlyHeight() const OVERRIDE;
 
   // Overridden from TabStripModelObserver.
   virtual void TabInsertedAt(TabContentsWrapper* contents,
@@ skipping 56 matching lines @@
   // window over other application windows due to panels having a higher
   // priority NSWindowLevel, so we distinguish between the two scenarios.
   bool activation_requested_by_browser_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelBrowserWindowCocoa);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_BROWSER_WINDOW_COCOA_H_