Make overuse estimator one dimensional.

webrtc/modules/remote_bitrate_estimator/inter_arrival.h

Index: webrtc/modules/remote_bitrate_estimator/inter_arrival.h
diff --git a/webrtc/modules/remote_bitrate_estimator/inter_arrival.h b/webrtc/modules/remote_bitrate_estimator/inter_arrival.h
index 427bafcf96ffaedea1ce6ffca4ab8c56635b54f4..233e7130cdde546f942e3f728edbc5d4e941092a 100644
--- a/webrtc/modules/remote_bitrate_estimator/inter_arrival.h
+++ b/webrtc/modules/remote_bitrate_estimator/inter_arrival.h
@@ -34,22 +34,17 @@ class InterArrival {
   // group is still incomplete or if only one group has been completed.
   // |timestamp| is the timestamp.
   // |arrival_time_ms| is the local time at which the packet arrived.
-  // |packet_size| is the size of the packet.
   // |timestamp_delta| (output) is the computed timestamp delta.
   // |arrival_time_delta_ms| (output) is the computed arrival-time delta.
-  // |packet_size_delta| (output) is the computed size delta.
   bool ComputeDeltas(uint32_t timestamp,
                      int64_t arrival_time_ms,
-                     size_t packet_size,
                      uint32_t* timestamp_delta,
-                     int64_t* arrival_time_delta_ms,
-                     int* packet_size_delta);
+                     int64_t* arrival_time_delta_ms);
 
  private:
   struct TimestampGroup {
     TimestampGroup()
-        : size(0),
-          first_timestamp(0),
+        : first_timestamp(0),
           timestamp(0),
           complete_time_ms(-1) {}
 
@@ -57,7 +52,6 @@ class InterArrival {
       return complete_time_ms == -1;
     }
 
-    size_t size;
     uint32_t first_timestamp;
     uint32_t timestamp;
     int64_t complete_time_ms;