PingPong           45 base/threading/thread_perftest.cc   virtual void PingPong(int hops) = 0;
PingPong           79 base/threading/thread_perftest.cc     PingPong(kNumRuns);
PingPong          133 base/threading/thread_perftest.cc             &ThreadPerfTest::PingPong, base::Unretained(this), hops - 1));