relnote: Use event_time instead of ApproximateNow() in QUIC cubic code. Protected by --quic_use_eve…

net/quic/core/congestion_control/cubic_bytes.h

 // Copyright (c) 2015 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.
 
 // Cubic algorithm, helper class to TCP cubic.
 // For details see http://netsrv.csc.ncsu.edu/export/cubic_a_new_tcp_2008.pdf.
 
 #ifndef NET_QUIC_CORE_CONGESTION_CONTROL_CUBIC_BYTES_H_
 #define NET_QUIC_CORE_CONGESTION_CONTROL_CUBIC_BYTES_H_
 
@@ skipping 25 matching lines @@
   // Returns the new congestion window in packets. The new congestion window is
   // a multiplicative decrease of our current window.
   QuicByteCount CongestionWindowAfterPacketLoss(QuicPacketCount current);
 
   // Compute a new congestion window to use after a received ACK.
   // Returns the new congestion window in bytes. The new congestion window
   // follows a cubic function that depends on the time passed since last packet
   // loss.
   QuicByteCount CongestionWindowAfterAck(QuicByteCount acked_bytes,
                                          QuicByteCount current,
-                                         QuicTime::Delta delay_min);
+                                         QuicTime::Delta delay_min,
+                                         QuicTime event_time);
 
   // Call on ack arrival when sender is unable to use the available congestion
   // window. Resets Cubic state during quiescence.
   void OnApplicationLimited();
 
   void SetFixConvexMode(bool fix_convex_mode);
 
   void SetFixCubicQuantization(bool fix_cubic_quantization);
 
  private:
@@ skipping 49 matching lines @@
   // Fix for quantization in cubic mode.
   // TODO(jokulik):  Remove once the experiment is done.
   bool fix_cubic_quantization_;
 
   DISALLOW_COPY_AND_ASSIGN(CubicBytes);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_CONGESTION_CONTROL_CUBIC_BYTES_H_