Request for Review (M) - 6858051: Create GC worker threads dynamically

[Thomas Schatzl]

Hi Jon,

On Thu, 2016-04-28 at 20:27 -0700, Jon Masamitsu wrote:
> Testing turned up an assertion failure.  I fixed it (1 line) and
> added it
> 
> to this webrev (webrev.02)
> 
> Thanks.

  looks good.

Thomas