Add a instance groups to Connect(), and introduce an Identity struct.

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

Index: mojo/shell/public/cpp/lib/interface_registry.cc
diff --git a/mojo/shell/public/cpp/lib/interface_registry.cc b/mojo/shell/public/cpp/lib/interface_registry.cc
index 93332074387fbfb94ee6f10a3a3ae726b72eba2a..c8f9703b6c077ce5792333ff398ec5fbf681c153 100644
--- a/mojo/shell/public/cpp/lib/interface_registry.cc
+++ b/mojo/shell/public/cpp/lib/interface_registry.cc
@@ -53,7 +53,7 @@ bool InterfaceRegistry::SetInterfaceBinderForName(
   LOG(WARNING) << "Connection CapabilityFilter prevented binding to interface: "
                << interface_name << " connection_name:"
                << connection_->GetConnectionName() << " remote_name:"
-               << connection_->GetRemoteApplicationName();
+               << connection_->GetRemoteIdentity().name();
   return false;
 }