Add TRACE_EVENT macros to net.

net/quic/quic_stream_factory.cc

Index: net/quic/quic_stream_factory.cc
diff --git a/net/quic/quic_stream_factory.cc b/net/quic/quic_stream_factory.cc
index a032f2e9f33ad13a7056b3af3978fadddeeacc0a..fa85e628ecdcb00f97ca56180aee05bec50763d9 100644
--- a/net/quic/quic_stream_factory.cc
+++ b/net/quic/quic_stream_factory.cc
@@ -19,6 +19,7 @@
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/thread_task_runner_handle.h"
+#include "base/trace_event/trace_event.h"
 #include "base/values.h"
 #include "net/base/ip_address.h"
 #include "net/base/net_errors.h"
@@ -266,6 +267,7 @@ int QuicStreamFactory::Job::Run(const CompletionCallback& callback) {
 }
 
 int QuicStreamFactory::Job::DoLoop(int rv) {
+  TRACE_EVENT0("net", "QuicStreamFactory::Job::DoLoop");
   do {
     IoState state = io_state_;
     io_state_ = STATE_NONE;
@@ -1502,6 +1504,7 @@ int QuicStreamFactory::CreateSession(const QuicServerId& server_id,
                                      base::TimeTicks dns_resolution_end_time,
                                      const BoundNetLog& net_log,
                                      QuicChromiumClientSession** session) {
+  TRACE_EVENT0("net", "QuicStreamFactory::CreateSession");
   IPEndPoint addr = *address_list.begin();
   bool enable_port_selection = enable_port_selection_;
   if (enable_port_selection && ContainsKey(gone_away_aliases_, server_id)) {