Use rtc::time for all your timing needs!

webrtc/base/timeutils.cc

Index: webrtc/base/timeutils.cc
diff --git a/webrtc/base/timeutils.cc b/webrtc/base/timeutils.cc
index 05e9ad8243be1eb9447f468bc0fae0955263eed2..24b04ee2ee46342c1551901309042f8f4438955a 100644
--- a/webrtc/base/timeutils.cc
+++ b/webrtc/base/timeutils.cc
@@ -74,6 +74,8 @@ uint64_t TimeNanos() {
   // TODO: Calculate with nanosecond precision.  Otherwise, we're just
   // wasting a multiply and divide when doing Time() on Windows.
   ticks = ticks * kNumNanosecsPerMillisec;
+#else
+#error Unsupported platform.
 #endif
   return ticks;
 }