fix wrong implementation of AimdRateControl::TimeToReduceFurther.

webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc

Index: webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc b/webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc
index 530453d74cc1612c105de25bb7cc0280d261c53a..0e1ce16cf672a963b8518ebfedce0f77ea275ce2 100644
--- a/webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc
+++ b/webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc
@@ -24,7 +24,6 @@
 namespace webrtc {
 
 static const int64_t kDefaultRttMs = 200;
-static const double kWithinIncomingBitrateHysteresis = 1.05;
 static const int64_t kMaxFeedbackIntervalMs = 1000;
 
 AimdRateControl::AimdRateControl()
@@ -72,10 +71,9 @@ bool AimdRateControl::TimeToReduceFurther(int64_t time_now,
     return true;
   }
   if (ValidEstimate()) {
-    const int threshold = static_cast<int>(kWithinIncomingBitrateHysteresis *
-                                           incoming_bitrate_bps);
-    const int bitrate_difference = LatestEstimate() - incoming_bitrate_bps;
-    return bitrate_difference > threshold;
+    const uint32_t threshold = static_cast<uint32_t>
+        (0.95 * LatestEstimate());
+    return incoming_bitrate_bps <= threshold;
   }
   return false;
 }