Modify isolate proto to have UI key

appengine/isolate/handlers_frontend.py

 # Copyright 2012 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 """This module defines Isolate Server frontend url handlers."""
 
 import collections
 import datetime
 import json
 import logging
@@ skipping 376 matching lines @@
 
 
 class UIHandler(auth.AuthenticatingHandler):
   """Serves the landing page for the new UI of the requested page.
 
   This landing page is stamped with the OAuth 2.0 client id from the
   configuration.
   """
   @auth.public
   def get(self):
-    params = {}
+    params = {
+      'client_id': config.settings().ui_client_id,
+    }
     # Can cache for 1 week, because the only thing that would change in this
     # template is the oauth client id, which changes very infrequently.
     self.response.cache_control.no_cache = None
     self.response.cache_control.public = True
     self.response.cache_control.max_age = 604800
     try:
       self.response.write(template.render(
         'isolate/public_isolate_index.html', params))
     except template.TemplateNotFound:
       self.abort(404, 'Page not found.')
@@ skipping 47 matching lines @@
 def create_application(debug):
   """Creates the url router.
 
   The basic layouts is as follow:
   - /restricted/.* requires being an instance administrator.
   - /stats/.* has statistics.
   """
   acl.bootstrap()
   template.bootstrap()
   return webapp2.WSGIApplication(get_routes(), debug=debug)