Revert "Options2: Pull the trigger."

chrome/browser/ui/webui/options2/chromeos/system_options_handler.h

-// Copyright (c) 2011 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_WEBUI_OPTIONS2_CHROMEOS_SYSTEM_OPTIONS_HANDLER_H_
-#define CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_SYSTEM_OPTIONS_HANDLER_H_
-#pragma once
-
-#include "base/memory/weak_ptr.h"
-#include "base/compiler_specific.h"
-#include "chrome/browser/ui/webui/options2/options_ui.h"
-
-namespace base {
-class DictionaryValue;
-}
-
-// ChromeOS system options page UI handler.
-class SystemOptionsHandler
-  : public OptionsPage2UIHandler,
-    public base::SupportsWeakPtr<SystemOptionsHandler> {
- public:
-  SystemOptionsHandler();
-  virtual ~SystemOptionsHandler();
-
-  // OptionsPage2UIHandler implementation.
-  virtual void GetLocalizedValues(
-      base::DictionaryValue* localized_strings) OVERRIDE;
-  virtual void Initialize() OVERRIDE;
-
-  virtual void RegisterMessages() OVERRIDE;
-
-  // Called when the accessibility checkbox value is changed.
-  // |args| will contain the checkbox checked state as a string
-  // ("true" or "false").
-  void AccessibilityChangeCallback(const base::ListValue* args);
-
-  // Called when the System configuration screen is used to adjust
-  // the screen brightness.
-  // |args| will be an empty list.
-  void DecreaseScreenBrightnessCallback(const base::ListValue* args);
-  void IncreaseScreenBrightnessCallback(const base::ListValue* args);
-
- private:
-  // Callback for TouchpadHelper.
-  void TouchpadExists(bool* exists);
-
-  DISALLOW_COPY_AND_ASSIGN(SystemOptionsHandler);
-};
-
-#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_SYSTEM_OPTIONS_HANDLER_H_