Fix unused variable pylint warning.

mojo/public/python/mojo_application/application_delegate.py

 # 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.
 
 """Interface for the delegate of ApplicationImpl."""
 
 import mojo_application.application_impl
 import mojo_application.service_provider_impl
 import shell_mojom
 
 import mojo_system
 
 # pylint: disable=unused-argument
 class ApplicationDelegate:
   def Initialize(self, shell, application):
     """
     Called from ApplicationImpl's Initialize() method.
     """
     pass
 
-  def OnAcceptConnection(self, service_provider, requestor_url,
+  def OnAcceptConnection(self,
+                         requestor_url,
+                         resolved_url,
+                         service_provider,
                          exposed_services):
     """
     Called from ApplicationImpl's OnAcceptConnection() method. Returns a bool
     indicating whether this connection should be accepted.
     """
-    return True
+    return False