3310e0cebd
This change prevents IO Service requests from colliding on the same IO Service port. If requests can collide, a request that could otherwise be serviced immediately can become blocked on a request that is blocked. To avoid collisions, this change maintains a free list of IO Service ports. If the free list is empty, we allocate a new IO Service port. R=bkonyi@google.com Review-Url: https://codereview.chromium.org/2903593004 .