Fixing issue that causes STUN throttle rate to be off by a factor of 1000.

content/browser/renderer_host/p2p/socket_host_throttler.cc

Index: content/browser/renderer_host/p2p/socket_host_throttler.cc
diff --git a/content/browser/renderer_host/p2p/socket_host_throttler.cc b/content/browser/renderer_host/p2p/socket_host_throttler.cc
index 57437d148db785431e499a72aad6c5a07c2eb871..90c4208834cb798796be1e073d9cd62aed7b4c4f 100644
--- a/content/browser/renderer_host/p2p/socket_host_throttler.cc
+++ b/content/browser/renderer_host/p2p/socket_host_throttler.cc
@@ -31,7 +31,7 @@ void P2PMessageThrottler::SetSendIceBandwidth(int bandwidth_kbps) {
 
 bool P2PMessageThrottler::DropNextPacket(size_t packet_len) {
   double now =
-      rtc::TimeMicros() / static_cast<double>(rtc::kNumMicrosecsPerMillisec);
+      rtc::TimeNanos() / static_cast<double>(rtc::kNumNanosecsPerSec);
   if (!rate_limiter_->CanUse(packet_len, now)) {
     // Exceeding the send rate, this packet should be dropped.
     return true;