Add key modifier on minimize/restore button click to minimize/restore all Panels for Mac.

chrome/browser/ui/panels/panel.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_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_H_
 #pragma once
 
 #include "chrome/browser/ui/browser_window.h"
 
@@ skipping 201 matching lines @@
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Construct a native panel BrowserWindow implementation for the specified
   // |browser|.
   static NativePanel* CreateNativePanel(Browser* browser,
                                         Panel* panel,
                                         const gfx::Rect& bounds);
 
   // Invoked when the native panel has detected a mouse click on the
-  // panel's titlebar. Behavior of the click may be modified as
-  // indicated by |modifier|.
+  // panel's titlebar, minimize or restore buttons. Behavior of the
+  // click may be modified as indicated by |modifier|.
   void OnTitlebarClicked(panel::ClickModifier modifier);
+  void OnMinimizeButtonClicked(panel::ClickModifier modifier);
+  void OnRestoreButtonClicked(panel::ClickModifier modifier);
 
   // Used on platforms where the panel cannot determine its window size
   // until the window has been created. (e.g. GTK)
   void OnWindowSizeAvailable();
 
   // Asynchronous completion of panel close request.
   void OnNativePanelClosed();
 
   NativePanel* native_panel() { return native_panel_; }
   Browser* browser() const { return browser_; }
@@ skipping 126 matching lines @@
   AttentionMode attention_mode_;
 
   ExpansionState expansion_state_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(Panel);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_H_