Rename MaybeUpdateAckFrequency to MaybeEnableAckDecimation.

PiperOrigin-RevId: 874173443

quiche/quic/core/quic_received_packet_manager.cc

diff --git a/quiche/quic/core/quic_received_packet_manager.cc b/quiche/quic/core/quic_received_packet_manager.cc
index 5b78319..39aba3a 100644
--- a/quiche/quic/core/quic_received_packet_manager.cc
+++ b/quiche/quic/core/quic_received_packet_manager.cc
@@ -262,13 +262,9 @@
   return std::max(ack_delay, kAlarmGranularity);
 }
 
-void QuicReceivedPacketManager::MaybeUpdateAckFrequency(
+void QuicReceivedPacketManager::MaybeEnableAckDecimation(
     QuicPacketNumber last_received_packet_number) {
-  if (AckFrequencyFrameReceived()) {
-    // Skip Ack Decimation below after receiving an AckFrequencyFrame from the
-    // other end point.
-    return;
-  }
+  QUICHE_DCHECK(!AckFrequencyFrameReceived());
   if (last_received_packet_number <
       PeerFirstSendingPacketNumber() + min_received_before_ack_decimation_) {
     return;
@@ -330,7 +326,9 @@
 
   ++num_retransmittable_packets_received_since_last_ack_sent_;
 
-  MaybeUpdateAckFrequency(last_received_packet_number);
+  if (!AckFrequencyFrameReceived()) {
+    MaybeEnableAckDecimation(last_received_packet_number);
+  }
   if (num_retransmittable_packets_received_since_last_ack_sent_ >=
       ack_frequency_) {
     ack_timeout_ = now;

quiche/quic/core/quic_received_packet_manager.h

diff --git a/quiche/quic/core/quic_received_packet_manager.h b/quiche/quic/core/quic_received_packet_manager.h
index 7bf05b6..78942d0 100644
--- a/quiche/quic/core/quic_received_packet_manager.h
+++ b/quiche/quic/core/quic_received_packet_manager.h
@@ -149,8 +149,8 @@
   // Sets ack_timeout_ to |time| if ack_timeout_ is not initialized or > time.
   void MaybeUpdateAckTimeoutTo(QuicTime time);
 
-  // Maybe update ack_frequency_ when condition meets.
-  void MaybeUpdateAckFrequency(QuicPacketNumber last_received_packet_number);
+  // Sets ack_frequency_ when enough packets have been received.
+  void MaybeEnableAckDecimation(QuicPacketNumber last_received_packet_number);
 
   QuicTime::Delta GetMaxAckDelay(QuicPacketNumber last_received_packet_number,
                                  const RttStats& rtt_stats) const;