Deprecate --quic_use_socket_timestamp.

net/quic/quic_connection.cc

Index: net/quic/quic_connection.cc
diff --git a/net/quic/quic_connection.cc b/net/quic/quic_connection.cc
index 1bf3903c8a6eee5f5173e5b40d72c2020bb132cc..de6515b723a6d5e0600b94e7743889a06794f5ba 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -1303,11 +1303,9 @@ void QuicConnection::ProcessUdpPacket(const IPEndPoint& self_address,
   stats_.bytes_received += packet.length();
   ++stats_.packets_received;
 
-  if (FLAGS_quic_use_socket_timestamp) {
-    time_of_last_received_packet_ = packet.receipt_time();
-    DVLOG(1) << ENDPOINT << "time of last received packet: "
-             << time_of_last_received_packet_.ToDebuggingValue();
-  }
+  time_of_last_received_packet_ = packet.receipt_time();
+  DVLOG(1) << ENDPOINT << "time of last received packet: "
+           << time_of_last_received_packet_.ToDebuggingValue();
 
   ScopedRetransmissionScheduler alarm_delayer(this);
   if (!framer_.ProcessPacket(packet)) {
@@ -1446,12 +1444,6 @@ bool QuicConnection::ProcessValidatedPacket(const QuicPacketHeader& header) {
 
   DCHECK_EQ(NEGOTIATED_VERSION, version_negotiation_state_);
 
-  if (!FLAGS_quic_use_socket_timestamp) {
-    time_of_last_received_packet_ = clock_->Now();
-    DVLOG(1) << ENDPOINT << "time of last received packet: "
-             << time_of_last_received_packet_.ToDebuggingValue();
-  }
-
   if (last_size_ > largest_received_packet_size_) {
     largest_received_packet_size_ = last_size_;
   }