Allow storing display preferences per device.

chrome/browser/chromeos/display_preferences.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_CHROMEOS_DISPLAY_PREFERENCES_H_
+#define CHROME_BROWSER_CHROMEOS_DISPLAY_PREFERENCES_H_
+
+#include "base/compiler_specific.h"

[oshima, 2012/08/27 23:00:46]

do you need this?

[Jun Mukai, 2012/08/28 08:12:42]

removed.

+
+class PrefService;
+namespace gfx {
+class Display;
+}
+
+namespace chromeos {
+
+void RegisterDisplayPrefs(PrefService* pref_service);
+
+void SetDisplayLayoutPref(PrefService* pref_service,
+                          const gfx::Display& display, int layout, int offset);
+
+void NotifyDisplayPrefChanged(PrefService* pref_service);
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_DISPLAY_PREFERENCES_H_