Notify NQE of TCP RTT values

net/socket/client_socket_factory.cc

Index: net/socket/client_socket_factory.cc
diff --git a/net/socket/client_socket_factory.cc b/net/socket/client_socket_factory.cc
index 311f926b59fcefdc3f2c9be276d025c0251dfcd3..9a547a49b98fb633ffbbec6d5a65cb4d5769bdaa 100644
--- a/net/socket/client_socket_factory.cc
+++ b/net/socket/client_socket_factory.cc
@@ -8,6 +8,8 @@
 
 #include "base/lazy_instance.h"
 #include "build/build_config.h"
+#include "net/base/socket_performance_watcher.h"
+#include "net/base/socket_performance_watcher_factory.h"
 #include "net/cert/cert_database.h"
 #include "net/socket/client_socket_handle.h"
 #include "net/socket/tcp_client_socket.h"
@@ -60,10 +62,19 @@ class DefaultClientSocketFactory : public ClientSocketFactory,
 
   scoped_ptr<StreamSocket> CreateTransportClientSocket(
       const AddressList& addresses,
+      SocketPerformanceWatcherFactory* socket_performance_watcher_factory,
       NetLog* net_log,
       const NetLog::Source& source) override {
-    return scoped_ptr<StreamSocket>(
-        new TCPClientSocket(addresses, net_log, source));
+    // Create a |SocketPerformanceWatcher|, and pass the ownership to the
+    // TCPClientSocket.
+    scoped_ptr<SocketPerformanceWatcher> socket_performance_watcher;
+    if (socket_performance_watcher_factory) {
+      socket_performance_watcher =
+          socket_performance_watcher_factory->CreateSocketPerformanceWatcher(
+              SocketPerformanceWatcherFactory::PROTOCOL_TCP);
+    }
+    return scoped_ptr<StreamSocket>(new TCPClientSocket(
+        addresses, std::move(socket_performance_watcher), net_log, source));
   }
 
   scoped_ptr<SSLClientSocket> CreateSSLClientSocket(