Use core/paper elements in media-router-container.

chrome/browser/ui/webui/media_router/media_router_resources_provider.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/media_router/media_router_resources_provider.h"
 
 #include "content/public/browser/web_ui_data_source.h"
 #include "grit/browser_resources.h"
 
 namespace {
 
 void AddIcons(content::WebUIDataSource* html_source) {
-  html_source->AddResourcePath("elements/icon/close-gray.png",
-                              IDR_CLOSE_GRAY_ICON);
-  html_source->AddResourcePath("elements/icon/close-gray2x.png",
-                              IDR_CLOSE_GRAY_2X_ICON);
   html_source->AddResourcePath("elements/icon/drop-down-arrow.png",
                               IDR_DROP_DOWN_ARROW_ICON);
   html_source->AddResourcePath("elements/icon/drop-down-arrow2x.png",
                               IDR_DROP_DOWN_ARROW_2X_ICON);
   html_source->AddResourcePath("elements/icon/drop-down-arrow-hover.png",
                               IDR_DROP_DOWN_ARROW_HOVER_ICON);
   html_source->AddResourcePath("elements/icon/drop-down-arrow-hover2x.png",
                               IDR_DROP_DOWN_ARROW_HOVER_2X_ICON);
   html_source->AddResourcePath("elements/icon/drop-down-arrow-showing.png",
                               IDR_DROP_DOWN_ARROW_SHOWING_ICON);
@@ skipping 70 matching lines @@
 namespace media_router {
 
 void AddMediaRouterUIResources(content::WebUIDataSource* html_source) {
   AddIcons(html_source);
   AddMainWebResources(html_source);
   AddPolymerElements(html_source);
   html_source->SetDefaultResource(IDR_MEDIA_ROUTER_HTML);
 }
 
 }  // namespace media_router