Update test_tire to use std::shared_ptr
Update test_tire to use std::shared_ptr

jcmadsen/chrono,armanpazouki/chrono,dariomangoni/chrono,projectchrono/chrono,jcmadsen/chrono,armanpazouki/chrono,jcmadsen/chrono,rserban/chrono,amelmquist/chrono,tjolsen/chrono,armanpazouki/chrono,projectchrono/chrono,dariomangoni/chrono,dariomangoni/chrono,jcmadsen/chrono,Milad-Rakhsha/chrono,andrewseidl/chrono,Milad-Rakhsha/chrono,tjolsen/chrono,armanpazouki/chrono,rserban/chrono,andrewseidl/chrono,dariomangoni/chrono,jcmadsen/chrono,tjolsen/chrono,Milad-Rakhsha/chrono,jcmadsen/chrono,dariomangoni/chrono,armanpazouki/chrono,rserban/chrono,andrewseidl/chrono,projectchrono/chrono,jcmadsen/chrono,projectchrono/chrono,andrewseidl/chrono,rserban/chrono,andrewseidl/chrono,tjolsen/chrono,rserban/chrono,Milad-Rakhsha/chrono,rserban/chrono,amelmquist/chrono,amelmquist/chrono,tjolsen/chrono,amelmquist/chrono,amelmquist/chrono,amelmquist/chrono,Milad-Rakhsha/chrono,projectchrono/chrono,rserban/chrono,Milad-Rakhsha/chrono,dariomangoni/chrono,armanpazouki/chrono,projectchrono/chrono