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

net/quic/core/congestion_control/cubic.h

 // Copyright (c) 2012 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_H_
 #define NET_QUIC_CORE_CONGESTION_CONTROL_CUBIC_H_
 
@@ skipping 20 matching lines @@
   // Compute a new congestion window to use after a loss event.
   // Returns the new congestion window in packets. The new congestion window is
   // a multiplicative decrease of our current window.
   QuicPacketCount CongestionWindowAfterPacketLoss(QuicPacketCount current);
 
   // Compute a new congestion window to use after a received ACK.
   // Returns the new congestion window in packets. The new congestion
   // window follows a cubic function that depends on the time passed
   // since last packet loss.
   QuicPacketCount CongestionWindowAfterAck(QuicPacketCount 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();
 
   // If true, enable the fix for the convex-mode signing bug.  See
   // b/32170105 for more information about the bug.
   // TODO(jokulik):  Remove once the fix is enabled by default.
   void SetFixConvexMode(bool fix_convex_mode);
 
@@ skipping 53 matching lines @@
   // Fix convex mode for cubic.
   // TODO(jokulik):  Remove once the cubic convex experiment is done.
   bool fix_convex_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(Cubic);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_CONGESTION_CONTROL_CUBIC_H_