Internal QUICHE change

PiperOrigin-RevId: 321859385
Change-Id: I06bc800c53946b9417e9d4e81186aafd62814a20

quic/core/quic_connection.cc

diff --git a/quic/core/quic_connection.cc b/quic/core/quic_connection.cc
index 63a79db..eac8f5e 100644
--- a/quic/core/quic_connection.cc
+++ b/quic/core/quic_connection.cc
@@ -2428,6 +2428,7 @@
     // Server is constrained by the amplification restriction.
     QUIC_CODE_COUNT(quic_throttled_by_amplification_limit);
     QUIC_DVLOG(1) << ENDPOINT << "Constrained by amplification restriction";
+    ++stats_.num_amplification_throttling;
     return false;
   }
 

quic/core/quic_connection_stats.h

diff --git a/quic/core/quic_connection_stats.h b/quic/core/quic_connection_stats.h
index 529a4ef..88f8880 100644
--- a/quic/core/quic_connection_stats.h
+++ b/quic/core/quic_connection_stats.h
@@ -171,6 +171,10 @@
   // the time between stream creation to the time its last ack is received,
   // minus the peer ack delay in the last ack.
   QuicTime::Delta total_response_time = QuicTime::Delta::Zero();
+
+  // Number of times when the connection tries to send data but gets throttled
+  // by amplification factor.
+  size_t num_amplification_throttling = 0;
 };
 
 }  // namespace quic