SetMockTickFunction  711 base/time/time.h   static TickFunctionType SetMockTickFunction(TickFunctionType ticker);
SetMockTickFunction   26 base/time/time_win_unittest.cc     old_tick_function_ = SetMockTickFunction(&Ticker);
SetMockTickFunction   31 base/time/time_win_unittest.cc     SetMockTickFunction(old_tick_function_);