Save display preference on boot

chrome/browser/ui/ash/chrome_shell_delegate.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_ASH_CHROME_SHELL_DELEGATE_H_
 #define CHROME_BROWSER_UI_ASH_CHROME_SHELL_DELEGATE_H_
 
 #include <string>
 
 #include "ash/launcher/launcher_types.h"
@@ skipping 11 matching lines @@
 }
 
 namespace content {
 class WebContents;
 }
 
 namespace keyboard {
 class KeyboardControllerProxy;
 }
 
+#if defined(OS_CHROMEOS)
+namespace chromeos {
+class DisplayConfigurationObserver;
+}
+#endif
+
 class ChromeLauncherController;
 
 class ChromeShellDelegate : public ash::ShellDelegate,
                             public content::NotificationObserver {
  public:
   ChromeShellDelegate();
   virtual ~ChromeShellDelegate();
 
   static ChromeShellDelegate* instance() { return instance_; }
 
@@ skipping 33 matching lines @@
 
  private:
   void PlatformInit();
 
   static ChromeShellDelegate* instance_;
 
   content::NotificationRegistrar registrar_;
 
   ChromeLauncherController* shelf_delegate_;
 
+#if defined(OS_CHROMEOS)
+  scoped_ptr<chromeos::DisplayConfigurationObserver>
+      display_configuration_observer_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(ChromeShellDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_CHROME_SHELL_DELEGATE_H_