Integrate About page into Settings for Chrome OS settings in a window.

chrome/browser/ui/webui/options/help_overlay_handler.cc

+// Copyright 2014 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.
+
+#include "chrome/browser/ui/webui/options/help_overlay_handler.h"
+
+#include "base/values.h"
+#include "chrome/browser/ui/webui/help/help_handler.h"
+#include "chrome/common/chrome_switches.h"
+#include "content/public/browser/web_ui.h"
+#include "grit/generated_resources.h"
+
+namespace options {
+
+HelpOverlayHandler::HelpOverlayHandler() {
+}
+
+HelpOverlayHandler::~HelpOverlayHandler() {
+}
+
+void HelpOverlayHandler::GetLocalizedValues(
+    base::DictionaryValue* localized_strings) {
+  RegisterTitle(localized_strings, "aboutOverlay", IDS_ABOUT_TITLE);
+  HelpHandler::GetLocalizedValues(localized_strings);
+}
+
+void HelpOverlayHandler::RegisterMessages() {
+  if (::switches::AboutInSettingsEnabled())
+    web_ui()->AddMessageHandler(new HelpHandler());
+}
+
+}  // namespace options