Round Rate computations from RateTracker.

webrtc/base/ratetracker.cc

Index: webrtc/base/ratetracker.cc
diff --git a/webrtc/base/ratetracker.cc b/webrtc/base/ratetracker.cc
index 5cb449016e8e8d26ccf2f24015d4ed7288a58183..35521a8d3d47bd9aec2c9a8708a8dfefd56dfbb5 100644
--- a/webrtc/base/ratetracker.cc
+++ b/webrtc/base/ratetracker.cc
@@ -73,8 +73,9 @@ double RateTracker::ComputeRateForInterval(
   size_t start_bucket = NextBucketIndex(current_bucket_ + buckets_to_skip);
   // Only count a portion of the first bucket according to how much of the
   // first bucket is within the current interval.
-  size_t total_samples = sample_buckets_[start_bucket] *
-      (bucket_milliseconds_ - milliseconds_to_skip) /
+  size_t total_samples = ((sample_buckets_[start_bucket] *
+      (bucket_milliseconds_ - milliseconds_to_skip)) +
+      (bucket_milliseconds_ >> 1)) /
       bucket_milliseconds_;
   // All other buckets in the interval are counted in their entirety.
   for (size_t i = NextBucketIndex(start_bucket);