Add a default Isolate gRPC proxy in config

appengine/swarming/handlers_bot.py

Index: appengine/swarming/handlers_bot.py
diff --git a/appengine/swarming/handlers_bot.py b/appengine/swarming/handlers_bot.py
index f961b2cc8aae410dc31999441dfb5f93f72d3b67..656ab8ed2688ca0bb56772d88bf67325d242c5a7 100644
--- a/appengine/swarming/handlers_bot.py
+++ b/appengine/swarming/handlers_bot.py
@@ -93,19 +93,8 @@ def has_missing_keys(minimum_keys, actual_keys, name):
 
 
 def get_bot_contact_server(request):

[Vadim Sh., 2017/06/29 21:56:23]

can we remove this function now?

[aludwin, 2017/06/29 23:38:57]

Done.

-  """Gets the server contacted by the bot.
-
-  Usually, this is the URL of the Swarming server itself, but if the bot
-  is communicating to the server by a gRPC intermediary, this will be the
-  IP address of the gRPC endpoint. The Native API will have an http or
-  https protocol, while gRPC endpoints will have a fake "grpc://" protocol.
-  This is to help consumers of this information (mainly the bot code
-  generators) distinguish between native and gRPC bots.
-  """
-  server = request.host_url
-  if 'luci-grpc' in request.headers:
-    server = 'grpc://%s' % request.headers['luci-grpc']
-  return server
+  """Gets the server contacted by the bot."""
+  return request.host_url
 
 
 class _BotApiHandler(auth.ApiHandler):