Make loading dialog prettier.

remoting/app_remoting_webapp_files.gypi

 # 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.
 
 {
   'variables': {
     'ar_shared_resource_files': [
       'webapp/app_remoting/html/ar_dialog.css',
       'webapp/app_remoting/html/ar_main.css',
       'webapp/app_remoting/html/feedback_consent.css',
+      'webapp/app_remoting/html/loading_window.css',
       'webapp/app_remoting/html/context_menu.css',
       'resources/drag.webp',
       '<@(remoting_webapp_resource_files)',
     ],
 
     # Variables for feedback_consent.html.
     'ar_feedback_consent_template':
       '<(DEPTH)/remoting/webapp/app_remoting/html/template_feedback_consent.html',
     # These JS files are specific to the feedback consent page and are not part
     # of the main JS files.
     'ar_feedback_consent_html_js_files': [
       'webapp/app_remoting/js/feedback_consent.js',
     ],
 
     # All the JavaScript files required by feedback_consent.html.
     'ar_feedback_consent_html_all_js_files': [
       'webapp/app_remoting/js/feedback_consent.js',
       'webapp/base/js/base.js',
       'webapp/crd/js/error.js',
       'webapp/crd/js/identity.js',
       'webapp/crd/js/oauth2_api.js',
       'webapp/crd/js/oauth2_api_impl.js',
       'webapp/crd/js/plugin_settings.js',
       'webapp/crd/js/l10n.js',
       'webapp/crd/js/xhr.js',
     ],
 
+    # Variables for loading_window.html. Note that the JS files are the same as
+    # for message_window.html, and are not duplicated here.
+    'ar_loading_window_template':
+      '<(DEPTH)/remoting/webapp/app_remoting/html/template_loading_window.html',
+
     # Variables for main.html.
     # These template files are used to construct the webapp html files.
     'ar_main_template':
       '<(DEPTH)/remoting/webapp/app_remoting/html/template_lg.html',
     'ar_main_template_files': [
       'webapp/base/html/client_plugin.html',
       'webapp/app_remoting/html/context_menu.html',
       'webapp/app_remoting/html/idle_dialog.html',
     ],
     'ar_main_js_files': [
@@ skipping 40 matching lines @@
       '<@(remoting_webapp_wcs_sandbox_html_js_files)',
       # Referenced from the manifest.
       '<@(ar_background_js_files)',
     ],
 
     # Files that contain localizable strings.
     'app_remoting_webapp_localizable_files': [
       '<(ar_main_template)',
       '<@(ar_main_template_files)',
       '<(ar_feedback_consent_template)',
+      '<(ar_loading_window_template)',
       '<(remoting_webapp_template_message_window)',
       '<(remoting_webapp_template_wcs_sandbox)',
       '<@(ar_all_js_files)',
     ],
 
   },  # end of variables
 }