commit adf8e94df9a1995c2bf61a0efd88d6eda240ffe1
author Robert Sesek <rsesek@chromium.org> Wed Apr 17 18:59:42 2019
committer Commit Bot <commit-bot@chromium.org> Wed Apr 17 18:59:42 2019
tree 4f19bf33313bf5b010e477b48acc3f1054d9d552
parent 30929267dc5157f96bf41a105a14c05029a562ce

Use pthread_mach_thread_np() in ComputeThreadTicks().

Using mach_thread_self() returns a reference that must be deallocated
with a separate system call. Using the cached port stored by pthreads
means not having to issue two system calls to get the thread ticks.

Change-Id: Ic3a1e8cbe74a88f070a1c6843b03778132a53b98
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1572438
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#651832}