Add ability to bind a different InterfaceRegistry/InterfaceProvider to an incoming Connection.

services/shell/public/cpp/lib/shell_client.cc

Index: services/shell/public/cpp/lib/shell_client.cc
diff --git a/services/shell/public/cpp/lib/shell_client.cc b/services/shell/public/cpp/lib/shell_client.cc
index 562d6ee46c444f738ce7e89af4d67c6b42b866c7..921dff578c3390072a3d3b2ae31cfae55cf33632 100644
--- a/services/shell/public/cpp/lib/shell_client.cc
+++ b/services/shell/public/cpp/lib/shell_client.cc
@@ -13,6 +13,14 @@ void ShellClient::Initialize(Connector* connector, const Identity& identity,
                              uint32_t id) {
 }
 
+InterfaceProvider* ShellClient::GetInterfaceProviderForConnection() {
+  return nullptr;
+}
+
+InterfaceRegistry* ShellClient::GetInterfaceRegistryForConnection() {
+  return nullptr;
+}
+
 bool ShellClient::AcceptConnection(Connection* connection) {
   return false;
 }