Notfiy NQE of QUIC RTT

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 9635102e867f74003024c04cc1ca967c634c2a80..04f88f158bcb29e7cd9937e8c55bfc230528993a 100644
--- a/net/quic/quic_connection_logger.cc
+++ b/net/quic/quic_connection_logger.cc
@@ -22,6 +22,7 @@
 #include "net/quic/crypto/crypto_protocol.h"
 #include "net/quic/quic_address_mismatch.h"
 #include "net/quic/quic_socket_address_coder.h"
+#include "net/quic/quic_time.h"
 
 using base::StringPiece;
 using std::string;
@@ -286,7 +287,8 @@ AddressFamily GetRealAddressFamily(const IPAddressNumber& address) {
 QuicConnectionLogger::QuicConnectionLogger(
     QuicSpdySession* session,
     const char* const connection_description,
-    const BoundNetLog& net_log)
+    const BoundNetLog& net_log,
+    scoped_ptr<SocketPerformanceWatcher> socket_performance_watcher)
     : net_log_(net_log),
       session_(session),
       last_received_packet_number_(0),
@@ -306,7 +308,8 @@ QuicConnectionLogger::QuicConnectionLogger(
       num_duplicate_packets_(0),
       num_blocked_frames_received_(0),
       num_blocked_frames_sent_(0),
-      connection_description_(connection_description) {}
+      connection_description_(connection_description),
+      socket_performance_watcher_(socket_performance_watcher.Pass()) {}
 
 QuicConnectionLogger::~QuicConnectionLogger() {
   UMA_HISTOGRAM_COUNTS("Net.QuicSession.OutOfOrderPacketsReceived",
@@ -786,6 +789,18 @@ float QuicConnectionLogger::ReceivedPacketLossRate() const {
   return num_received / largest_received_packet_number_;
 }
 
+void QuicConnectionLogger::OnRttChanged(QuicTime::Delta rtt) const {
+  // Notify socket performance watcher of the updated RTT value.
+  if (!socket_performance_watcher_)
+    return;
+
+  long microseconds = rtt.ToMicroseconds();
+  if (microseconds != 0) {
+    socket_performance_watcher_->OnUpdatedRTTAvailable(
+        base::TimeDelta::FromMicroseconds(rtt.ToMicroseconds()));
+  }
+}
+
 void QuicConnectionLogger::RecordAggregatePacketLossRate() const {
   // For short connections under 22 packets in length, we'll rely on the
   // Net.QuicSession.21CumulativePacketsReceived_* histogram to indicate packet