Allow injecting the instrumenter when using instrument_method_time.
Allow injecting the instrumenter when using instrument_method_time.

ChrisLundquist/nunes,jnunemaker/nunes,ChrisLundquist/nunes,jnunemaker/nunes,ChrisLundquist/nunes,ChrisLundquist/nunes,jnunemaker/nunes,jnunemaker/nunes