Add asserts to prevent mysterious hangs in a non-thread-safe gmock build.
Add asserts to prevent mysterious hangs in a non-thread-safe gmock build.

marcossilvadecastro/googletest,amitkr/googletest,marcossilvadecastro/googletest,marcossilvadecastro/googletest,marcossilvadecastro/googletest,amitkr/googletest,amitkr/googletest