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

mojo/shell/public/cpp/lib/connection_impl.cc

 // 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.
 
 #include "mojo/shell/public/cpp/lib/connection_impl.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 22 matching lines @@
       remote_ids_valid_(false),
       remote_user_id_(remote_user_id),
       local_registry_(std::move(local_interfaces), this),
       remote_interfaces_(std::move(remote_interfaces)),
       allowed_interfaces_(allowed_interfaces),
       allow_all_interfaces_(allowed_interfaces_.size() == 1 &&
                             allowed_interfaces_.count("*") == 1),
       weak_factory_(this) {}
 
 ConnectionImpl::ConnectionImpl()
-    : remote_id_(shell::mojom::Shell::kInvalidApplicationID),
+    : remote_id_(shell::mojom::Connector::kInvalidApplicationID),
       remote_ids_valid_(false),
       local_registry_(shell::mojom::InterfaceProviderRequest(), this),
       allow_all_interfaces_(true),
       weak_factory_(this) {}
 
 ConnectionImpl::~ConnectionImpl() {}
 
-shell::mojom::Shell::ConnectCallback ConnectionImpl::GetConnectCallback() {
+shell::mojom::Connector::ConnectCallback ConnectionImpl::GetConnectCallback() {
   return base::Bind(&ConnectionImpl::OnGotInstanceID,
                     weak_factory_.GetWeakPtr());
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ConnectionImpl, Connection implementation:
 
 const std::string& ConnectionImpl::GetConnectionURL() {
   return connection_url_;
 }
@@ skipping 52 matching lines @@
 
   remote_id_ = target_application_id;
   std::vector<Closure> callbacks;
   callbacks.swap(remote_id_callbacks_);
   for (auto callback : callbacks)
     callback.Run();
 }
 
 }  // namespace internal
 }  // namespace mojo