chromeos: Run beforeunload handlers when closing panels.

chrome/browser/chromeos/frame/panel_browser_view.cc

 // 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/chromeos/frame/panel_browser_view.h"
 
 #include "chrome/browser/chromeos/frame/panel_controller.h"
 #include "third_party/cros/chromeos_wm_ipc_enums.h"
 #include "views/widget/widget.h"
 #include "views/window/window.h"
@@ skipping 99 matching lines @@
 // PanelController::Delegate overrides.
 
 string16 PanelBrowserView::GetPanelTitle() {
   return browser()->GetWindowTitleForCurrentTab();
 }
 
 SkBitmap PanelBrowserView::GetPanelIcon() {
   return browser()->GetCurrentPageIcon();
 }
 
+bool PanelBrowserView::CanClosePanel() {
+  return ::BrowserView::CanClose();
+}
+
 void PanelBrowserView::ClosePanel() {
   Close();
 }
 
 }  // namespace chromeos