Add TRACE_EVENT macros to net.

net/socket/ssl_client_socket_pool.cc

Index: net/socket/ssl_client_socket_pool.cc
diff --git a/net/socket/ssl_client_socket_pool.cc b/net/socket/ssl_client_socket_pool.cc
index 371ec00ca24f06a94ce770a9377e4cdd5807f5e2..572cdc19eb6d2ea2722e328f220c2ba04efe6171 100644
--- a/net/socket/ssl_client_socket_pool.cc
+++ b/net/socket/ssl_client_socket_pool.cc
@@ -12,6 +12,7 @@
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/profiler/scoped_tracker.h"
+#include "base/trace_event/trace_event.h"
 #include "base/values.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/net_errors.h"
@@ -166,12 +167,14 @@ void SSLConnectJob::GetAdditionalErrorState(ClientSocketHandle* handle) {
 }
 
 void SSLConnectJob::OnIOComplete(int result) {
+  TRACE_EVENT0("net", "SSLConnectJob::OnIOComplete");

[mmenke, 2016/04/04 16:45:49]

Since we already have a separate event for DoLoop, should we move this to
NotifyDelegateOfCompletion instead?  That also makes it clearer this is
measuring stuff outside this class.

[ssid, 2016/04/05 00:50:13]

Makes sense!

   int rv = DoLoop(result);
   if (rv != ERR_IO_PENDING)
     NotifyDelegateOfCompletion(rv);  // Deletes |this|.
 }
 
 int SSLConnectJob::DoLoop(int result) {
+  TRACE_EVENT0("net", "SSLConnectJob::DoLoop");
   DCHECK_NE(next_state_, STATE_NONE);
 
   int rv = result;
@@ -289,6 +292,7 @@ int SSLConnectJob::DoTunnelConnectComplete(int result) {
 }
 
 int SSLConnectJob::DoSSLConnect() {
+  TRACE_EVENT0("net", "SSLConnectJob::DoSSLConnect");
   // TODO(pkasting): Remove ScopedTracker below once crbug.com/462815 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION("462815 SSLConnectJob::DoSSLConnect"));