Workaround for the bug on the frame ids when using clang.

Signed-off-by: Franco Cipollone <franco.c@ekumenlabs.com>

src/backend/geometry_utilities.h

@@ -106,6 +106,15 @@ const drake::systems::InputPort<T>& WirePriusGeometry(const std::string& frame_r
  const Translation3<T> kPriusCarToChassisTranslation(0., 0., 0.69785);
  const Quaternion<T> kPriusCarToChassisRotation{Quaternion<T>::Identity()};
 
+ // Here we make a explicit call to get_new_id() to ensure that the static variable in
+ // drake::common::Identifier (underlying type of drake::geometry::FrameId) is initialized.
+ // If we don't do this here, each get_new_id() call used in RegisterFrame method will attach
+ // the same id to all the frames. This is a bug in Drake that is raised only when using clang compiler.
+ // See https://github.com/maliput/delphyne_demos/issues/60
+ //
+ // TODO(https://github.com/maliput/delphyne_demos/issues/60): Remove this when a new version of Drake is used.
+ FrameId::get_new_id();
+
  // Registers a source for the given scene graph.
  const SourceId source_id = scene_graph->RegisterSource(frame_root);
  // Registers the Prius car frame.