Extract a Connector interface from Shell that can be cloned & passed to other threads

mojo/shell/connect_params.cc

 // 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.
 
 #include "mojo/shell/connect_params.h"
 
 #include <utility>
 
 #include "mojo/shell/application_instance.h"
 
 namespace mojo {
 namespace shell {
 
 ConnectParams::ConnectParams() {}
 
 ConnectParams::~ConnectParams() {}
 
 void ConnectParams::SetTargetURL(const GURL& target_url) {
   target_ = Identity(target_url, target_.qualifier(),
-                     mojom::Shell::kUserInherit, target_.filter());
+                     mojom::Connector::kUserInherit, target_.filter());
 }
 
 }  // namespace shell
 }  // namespace mojo