tree 151fe05ede98809c4299f756cdb08728e1fd0531
parent 5a71c6027b962f539cc86f9445efb32a02723fb9
author Dan Albert <danalbert@google.com> 1544821075 -0800
committer Dan Albert <danalbert@google.com> 1545334326 -0800

Don't inherit from std::string.

std::string should not be inherited from.

This code does not compile with the libc++ update because copy
constructors cannot be inherited (not sure why Clang allows this
prior to the update).

Test: mm
Bug: None
Change-Id: I9b83a918386016de892bba1a3ff144ab44741b7c