Cancel uninstall if the uninstall dialog's parent window is destroyed

chrome/browser/ui/cocoa/extensions/extension_uninstall_dialog_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/extensions/extension_uninstall_dialog.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include <string>
 
@@ skipping 55 matching lines @@
     delegate_->ExtensionUninstallCanceled();
 }
 
 }  // namespace
 
 // static
 extensions::ExtensionUninstallDialog*
 extensions::ExtensionUninstallDialog::Create(Profile* profile,
                                              gfx::NativeWindow parent,
                                              Delegate* delegate) {
-  return new ExtensionUninstallDialogCocoa(profile, parent, delegate);
+  return new ExtensionUninstallDialogCocoa(profile, delegate);
 }