Add a new way of using ServiceProviderImpl without InterfaceFactory.

mojo/public/cpp/application/lib/service_registry.cc

Index: mojo/public/cpp/application/lib/service_registry.cc
diff --git a/mojo/public/cpp/application/lib/service_registry.cc b/mojo/public/cpp/application/lib/service_registry.cc
index 6be0e100bc6804d57cef043ede377d6d3c58645f..3c34628cc845418e27cf0bf515d5f77ccdd6f3e0 100644
--- a/mojo/public/cpp/application/lib/service_registry.cc
+++ b/mojo/public/cpp/application/lib/service_registry.cc
@@ -34,6 +34,10 @@ void ServiceRegistry::RemoveServiceConnectorForName(
   service_connector_registry_.RemoveServiceConnectorForName(interface_name);
 }
 
+const ConnectionContext& ServiceRegistry::GetConnectionContext() const {
+  return connection_context_;
+}
+
 const std::string& ServiceRegistry::GetConnectionURL() {
   return connection_context_.connection_url;
 }