[Mac] Add a confirm to quit experiment to about:flags.

chrome/browser/cocoa/confirm_quit_panel_controller_unittest.mm

+// Copyright (c) 2010 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/cocoa/confirm_quit_panel_controller.h"
+
+#import "chrome/browser/cocoa/cocoa_test_helper.h"
+
+namespace {
+
+class ConfirmQuitPanelControllerTest : public CocoaTest {
+ public:
+  ConfirmQuitPanelControllerTest() : controller_(nil) {
+  }
+
+  ConfirmQuitPanelController* controller_;  // Weak, owns self.
+};
+
+
+TEST_F(ConfirmQuitPanelControllerTest, ShowAndDismiss) {
+  controller_ = [[ConfirmQuitPanelController alloc] init];
+  [controller_ showWindow:nil];
+  [controller_ dismissPanel];  // Releases self.
+}
+
+}  // namespace