Add a new histogram: Net.QuicSession.OutOfOrderGapReceived

net/quic/quic_connection_logger.cc

Index: net/quic/quic_connection_logger.cc
diff --git a/net/quic/quic_connection_logger.cc b/net/quic/quic_connection_logger.cc
index b5dfcd61028d87da0425e7d6d22fcb1b296d8e5e..2221b501231664389389571aeaafa983b641181f 100644
--- a/net/quic/quic_connection_logger.cc
+++ b/net/quic/quic_connection_logger.cc
@@ -301,6 +301,9 @@ void QuicConnectionLogger::OnPacketHeader(const QuicPacketHeader& header) {
   }
   if (header.packet_sequence_number < last_received_packet_sequence_number_) {
     ++out_of_order_recieved_packet_count_;
+    UMA_HISTOGRAM_COUNTS("Net.QuicSession.OutOfOrderGapReceived",
+                         last_received_packet_sequence_number_ -
+                             header.packet_sequence_number);
   }
   last_received_packet_sequence_number_ = header.packet_sequence_number;
 }