Make loading dialog prettier.

remoting/app_remoting_webapp_build.gypi

 # 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.
 
 {
   'includes': [
     'remoting_version.gypi',
     'remoting_locales.gypi',
     'remoting_options.gypi',
     'remoting_webapp_files.gypi',
@@ skipping 19 matching lines @@
 
     'variables': {
       'ar_app_manifest_app':
         '>(ar_app_path)/manifest.json.jinja2',
       'ar_app_manifest_common':
         'webapp/app_remoting/manifest_common.json.jinja2',
       'ar_app_specific_files': [
         '>(ar_app_path)/icon16.png',
         '>(ar_app_path)/icon48.png',
         '>(ar_app_path)/icon128.png',
+        '>(ar_app_path)/loading_splash.png',
       ],
       'ar_generated_html_files': [
+        '<(SHARED_INTERMEDIATE_DIR)/>(_target_name)/loading_window.html',
         '<(SHARED_INTERMEDIATE_DIR)/>(_target_name)/main.html',
         '<(SHARED_INTERMEDIATE_DIR)/>(_target_name)/message_window.html',
         '<(SHARED_INTERMEDIATE_DIR)/>(_target_name)/wcs_sandbox.html',
         '<(SHARED_INTERMEDIATE_DIR)/>(_target_name)/feedback_consent.html',
       ],
       'ar_webapp_files': [
         '<@(ar_app_specific_files)',
         '<@(ar_shared_resource_files)',
         '<@(ar_all_js_files)',
         '<@(ar_generated_html_files)',
@@ skipping 118 matching lines @@
         ],
         'action': [
           'python', '<(DEPTH)/remoting/webapp/build-html.py',
           '<(SHARED_INTERMEDIATE_DIR)/>(_target_name)/wcs_sandbox.html',
           '<(remoting_webapp_template_wcs_sandbox)',
           '--js',
           '<@(remoting_webapp_wcs_sandbox_html_all_js_files)',
         ],
       },
       {
+        'action_name': 'Build ">(ar_app_name)" loading_window.html',
+        'inputs': [
+          '<(DEPTH)/remoting/webapp/build-html.py',
+          '<(ar_loading_window_template)',
+        ],
+        'outputs': [
+          '<(SHARED_INTERMEDIATE_DIR)/>(_target_name)/loading_window.html',
+        ],
+        'action': [
+          'python', '<(DEPTH)/remoting/webapp/build-html.py',
+          '<(SHARED_INTERMEDIATE_DIR)/>(_target_name)/loading_window.html',
+          '<(ar_loading_window_template)',
+          # The loading window is just a reskin of the message window--all
+          # JS code is shared.
+          '--js', '<@(remoting_webapp_message_window_html_all_js_files)',
+        ],
+      },
+      {
         'action_name': 'Build ">(ar_app_name)" message_window.html',
         'inputs': [
           '<(DEPTH)/remoting/webapp/build-html.py',
           '<(remoting_webapp_template_message_window)',
         ],
         'outputs': [
           '<(SHARED_INTERMEDIATE_DIR)/>(_target_name)/message_window.html',
         ],
         'action': [
           'python', '<(DEPTH)/remoting/webapp/build-html.py',
@@ skipping 31 matching lines @@
         # rather than using the extension id.
         # This is only done for Dev apps because the app-id for Release apps
         # *must* match the extension id.
         'variables': {
           'remoting_app_id': ['--appid', '>(_app_id)'],
         },
       }],
     ],  # conditions
   },  # target_defaults
 }