Fix crash with some keyboard shortcuts in Cocoa Panels.

chrome/browser/ui/panels/panel_window_controller_cocoa.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_WINDOW_CONTROLLER_COCOA_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_
 
 // A class acting as the Objective-C controller for the Panel window
 // object. Handles interactions between Cocoa and the cross-platform
 // code. Each window has a single titlebar and is managed/owned by Panel.
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/cocoa_protocols.h"
 #include "base/memory/scoped_ptr.h"
+#import "chrome/browser/ui/cocoa/browser_command_executor.h"
 
 @class FindBarCocoaController;
 class PanelBrowserWindowCocoa;
 @class PanelTitlebarViewCocoa;
 
-@interface PanelWindowControllerCocoa : NSWindowController<NSWindowDelegate> {
+@interface PanelWindowControllerCocoa : NSWindowController<NSWindowDelegate,
+                                                       BrowserCommandExecutor> {
  @private
   IBOutlet PanelTitlebarViewCocoa* titlebar_view_;
   scoped_ptr<PanelBrowserWindowCocoa> windowShim_;
 }
 
 // Load the browser window nib and do any Cocoa-specific initialization.
 - (id)initWithBrowserWindow:(PanelBrowserWindowCocoa*)window;
 
 // Returns the TabContents' native view. It renders the content of the web page
 // in the Panel.
@@ skipping 13 matching lines @@
 - (void)addFindBar:(FindBarCocoaController*)findBarCocoaController;
 
 // Initiate the closing of the panel, starting from the platform-independent
 // layer. This will take care of PanelManager, other panels and close the
 // native window at the end.
 - (void)closePanel;
 
 // Accessor for titlebar view.
 - (PanelTitlebarViewCocoa*)titlebarView;
 
+// Executes the command in the context of the current browser.
+// |command| is an integer value containing one of the constants defined in the
+// "chrome/app/chrome_command_ids.h" file.
+- (void)executeCommand:(int)command;
+
 @end  // @interface PanelWindowController
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_