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

content/browser/renderer_host/p2p/socket_host_throttler.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/p2p/socket_host_throttler.h"
 
 #include <utility>
 
 #include "third_party/webrtc/base/ratelimiter.h"
 #include "third_party/webrtc/base/timeutils.h"
@@ skipping 13 matching lines @@
 
 P2PMessageThrottler::~P2PMessageThrottler() {
 }
 
 void P2PMessageThrottler::SetSendIceBandwidth(int bandwidth_kbps) {
   rate_limiter_.reset(new rtc::RateLimiter(bandwidth_kbps, 1.0));
 }
 
 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;
   }
 
   rate_limiter_->Use(packet_len, now);
   return false;
 }
 
 }  // namespace content