Unframe chrome://extensions as it's the last (and only) uber item

chrome/browser/ui/webui/help/help_ui.cc

-// 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.
-
-#include "chrome/browser/ui/webui/help/help_ui.h"
-
-#include "base/memory/ptr_util.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ui/webui/help/help_handler.h"
-#include "chrome/common/url_constants.h"
-#include "chrome/grit/browser_resources.h"
-#include "content/public/browser/web_contents.h"
-#include "content/public/browser/web_ui.h"
-#include "content/public/browser/web_ui_data_source.h"
-
-namespace {
-
-content::WebUIDataSource* CreateAboutPageHTMLSource() {
-  content::WebUIDataSource* source =
-      content::WebUIDataSource::Create(chrome::kChromeUIHelpFrameHost);
-  source->SetJsonPath("strings.js");
-  source->AddResourcePath("help.js", IDR_HELP_JS);
-  source->AddResourcePath("help_page.js", IDR_HELP_PAGE_JS);
-  source->AddResourcePath("channel_change_page.js", IDR_CHANNEL_CHANGE_PAGE_JS);
-  source->SetDefaultResource(IDR_HELP_HTML);
-  source->DisableDenyXFrameOptions();
-  return source;
-}
-
-}  // namespace
-
-HelpUI::HelpUI(content::WebUI* web_ui)
-    : WebUIController(web_ui) {
-  Profile* profile = Profile::FromWebUI(web_ui);
-  content::WebUIDataSource* source = CreateAboutPageHTMLSource();
-
-  base::DictionaryValue localized_strings;
-  HelpHandler::GetLocalizedValues(&localized_strings);
-  source->AddLocalizedStrings(localized_strings);
-  content::WebUIDataSource::Add(profile, source);
-  web_ui->AddMessageHandler(base::MakeUnique<HelpHandler>());
-}
-
-HelpUI::~HelpUI() {
-}