Improve TaskEngine::wait_one().

This runs much faster.  Very good idea.

Change-Id: I088aa9588c069a17e4745be55c2397114ee8a2bc
Reviewed-on: https://skia-review.googlesource.com/10053
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
1 file changed