Add a cr-button element, a thin wrapper around paper-button.

chrome/browser/ui/webui/md_settings_ui.cc

 // Copyright 2015 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/md_settings_ui.h"
 
 #include <string>
 
 #include "base/values.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_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"
 #include "grit/browser_resources.h"
 
 MdSettingsUI::MdSettingsUI(content::WebUI* web_ui)
     : content::WebUIController(web_ui) {
   content::WebUIDataSource* html_source =
       content::WebUIDataSource::Create(chrome::kChromeUIMdSettingsHost);
 
+  html_source->AddResourcePath("md_settings.css", IDR_MD_SETTINGS_UI_CSS);
   html_source->SetDefaultResource(IDR_MD_SETTINGS_UI_HTML);
 
   content::WebUIDataSource::Add(web_ui->GetWebContents()->GetBrowserContext(),
                                 html_source);
 }
 
 MdSettingsUI::~MdSettingsUI() {
 }