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 cb5d85104869ab0da191117667a19609c16150e1..75fb016599636259a6ff89f7a2b412a4d1b0f783 100644
--- a/net/socket/client_socket_factory.cc
+++ b/net/socket/client_socket_factory.cc
@@ -8,6 +8,8 @@
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/sequenced_worker_pool.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"
 #if defined(USE_OPENSSL)
@@ -78,10 +80,18 @@ class DefaultClientSocketFactory : public ClientSocketFactory,
 
   scoped_ptr<StreamSocket> CreateTransportClientSocket(
       const AddressList& addresses,
+      const 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
+                                       ->CreateTCPSocketPerformanceWatcher();
+    }
+    return scoped_ptr<StreamSocket>(new TCPClientSocket(
+        addresses, socket_performance_watcher.Pass(), net_log, source));
   }
 
   scoped_ptr<SSLClientSocket> CreateSSLClientSocket(