Fix crash with some keyboard shortcuts in Cocoa Panels.

chrome/browser/ui/panels/panel_window_controller_cocoa.mm

 // 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.
 
 #include "chrome/browser/ui/panels/panel_window_controller_cocoa.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
@@ skipping 152 matching lines @@
 - (void)commandDispatchUsingKeyModifiers:(id)sender {
   DCHECK(sender);
   NSEvent* event = [NSApp currentEvent];
   WindowOpenDisposition disposition =
       event_utils::WindowOpenDispositionFromNSEventWithFlags(
           event, [event modifierFlags]);
   windowShim_->browser()->ExecuteCommandWithDisposition(
       [sender tag], disposition);
 }
 
+- (void)executeCommand:(int)command {
+  windowShim_->browser()->ExecuteCommandIfEnabled(command);
+}
+
 // Handler for the custom Close button.
 - (void)closePanel {
   windowShim_->panel()->Close();
 }
 
 // Called when the user wants to close the panel or from the shutdown process.
 // The Browser object is in control of whether or not we're allowed to close. It
 // may defer closing due to several states, such as onbeforeUnload handlers
 // needing to be fired. If closing is deferred, the Browser will handle the
 // processing required to get us to the closing state and (by watching for
@@ skipping 23 matching lines @@
 // When windowShouldClose returns YES (or if controller receives direct 'close'
 // signal), window will be unconditionally closed. Clean up.
 - (void)windowWillClose:(NSNotification*)notification {
   DCHECK(windowShim_->browser()->tabstrip_model()->empty());
 
   windowShim_->didCloseNativeWindow();
   [self autorelease];
 }
 
 @end