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

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

 // Copyright 2016 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/interface_registry.h"
 
 #include "mojo/shell/public/cpp/connection.h"
 
 namespace mojo {
 
@@ skipping 35 matching lines @@
     const std::string& interface_name) {
   if (!connection_ ||
       (connection_ && connection_->AllowsInterface(interface_name))) {
     RemoveInterfaceBinderForName(interface_name);
     name_to_binder_[interface_name] = binder;
     return true;
   }
   LOG(WARNING) << "Connection CapabilityFilter prevented binding to interface: "
                << interface_name << " connection_name:"
                << connection_->GetConnectionName() << " remote_name:"
-               << connection_->GetRemoteApplicationName();
+               << connection_->GetRemoteIdentity().name();
   return false;
 }
 
 void InterfaceRegistry::RemoveInterfaceBinderForName(
     const std::string& interface_name) {
   NameToInterfaceBinderMap::iterator it = name_to_binder_.find(interface_name);
   if (it == name_to_binder_.end())
     return;
   delete it->second;
   name_to_binder_.erase(it);
 }
 
 }  // namespace mojo