Add note page to settings.

chrome/browser/ui/webui/settings/chromeos/note_handler.h

+// Copyright 2016 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_SETTINGS_CHROMEOS_NOTE_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_SETTINGS_CHROMEOS_NOTE_HANDLER_H_
+
+#include "base/macros.h"
+#include "chrome/browser/ui/webui/settings/settings_page_ui_handler.h"
+
+namespace content {
+class WebUIDataSource;
+}
+
+namespace chromeos {
+namespace settings {
+
+// Chrome OS "Note" settings page UI handler.
+class NoteHandler : public ::settings::SettingsPageUIHandler {
+ public:
+  explicit NoteHandler(content::WebUIDataSource* html_source);
+  ~NoteHandler() override;
+
+ private:
+  // SettingsPageUIHandler implementation.
+  void RegisterMessages() override;
+  void OnJavascriptAllowed() override;
+  void OnJavascriptDisallowed() override;
+
+  DISALLOW_COPY_AND_ASSIGN(NoteHandler);
+};
+
+}  // namespace settings
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_UI_WEBUI_SETTINGS_CHROMEOS_NOTE_HANDLER_H_