Code review comment for lp:~kdub/mir/update-bufferstream-tracker-todos

We're committing to using raw pointers? Are you sure?

17 - /* Access the buffer resource that the id corresponds to.
18 - TODO: should really be a weak or shared ptr */
19 + /* Access the buffer resource that the id corresponds to. */
20 graphics::Buffer* buffer_from(graphics::BufferID) const;