Add SocketWatcherFactory as a helper class to NQE

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index 3d439fb2d92992a0de46bce4b720a20f66bb01a6..938aba45ac162dbe5b4ca3f3df61121f517b8f15 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -1291,9 +1291,10 @@ scoped_ptr<net::HttpNetworkSession> ProfileIOData::CreateHttpNetworkSession(
   net::HttpNetworkSession::Params params(io_thread->NetworkSessionParams());
   net::URLRequestContextBuilder::SetHttpNetworkSessionComponents(context,
                                                                  &params);
-  if (!IsOffTheRecord()) {
+  if (!IsOffTheRecord() && io_thread->globals()->network_quality_estimator) {
     params.socket_performance_watcher_factory =
-        io_thread->globals()->network_quality_estimator.get();
+        io_thread->globals()
+            ->network_quality_estimator->GetSocketPerformanceWatcherFactory();
   }
   if (data_reduction_proxy_io_data_.get())
     params.proxy_delegate = data_reduction_proxy_io_data_->proxy_delegate();