Cleanup: Pull some browser keep alive functions into its own file.

chrome/browser/ui/panels/panel.h

 // Copyright (c) 2012 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_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 12 matching lines @@
 #include "ui/gfx/image/image.h"
 
 class GURL;
 class NativePanel;
 class PanelCollection;
 class PanelHost;
 class PanelManager;
 class Profile;
 class StackedPanelCollection;
 
+namespace browser_lifetime {
+class ScopedKeepAlive;
+}
+
 namespace content {
 class WebContents;
 struct NativeWebKeyboardEvent;
 }
 
 namespace extensions {
 class Extension;
 class ExtensionRegistry;
 class WindowController;
 }
@@ skipping 353 matching lines @@
 
   // The CommandUpdater manages the window commands.
   CommandUpdater command_updater_;
 
   content::NotificationRegistrar registrar_;
   extensions::ExtensionRegistry* extension_registry_;
   const SessionID session_id_;
   scoped_ptr<extensions::WindowController> extension_window_controller_;
   scoped_ptr<PanelHost> panel_host_;
 
+#if !defined(USE_AURA)
+  scoped_ptr<browser_lifetime::ScopedKeepAlive> keep_alive_;
+#endif
+
   // Icon showed in the task bar.
   gfx::Image app_icon_;
 
   base::WeakPtrFactory<Panel> image_loader_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Panel);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_H_