dbus: Make Bus::GetManagedObjects skip unavailable services.

chromeos/dbus/dbus_thread_manager.cc

Index: chromeos/dbus/dbus_thread_manager.cc
diff --git a/chromeos/dbus/dbus_thread_manager.cc b/chromeos/dbus/dbus_thread_manager.cc
index ecb6af2e86b0b612dd487bd7641e62b53997bd20..e0df6117f28afa5346044361df66a8e07539468b 100644
--- a/chromeos/dbus/dbus_thread_manager.cc
+++ b/chromeos/dbus/dbus_thread_manager.cc
@@ -216,11 +216,6 @@ void DBusThreadManager::InitializeClients() {
   GetSystemClockClient()->Init(GetSystemBus());
   GetUpdateEngineClient()->Init(GetSystemBus());
 
-  // This must be called after the list of clients so they've each had a
-  // chance to register with their object g_dbus_thread_managers.
-  if (GetSystemBus())
-    GetSystemBus()->GetManagedObjects();
-
   client_bundle_->SetupDefaultEnvironment();
 }