[NOT FOR REVIEW] Instrument net/ with trace events.

net/socket/ssl_client_socket_openssl.cc

Index: net/socket/ssl_client_socket_openssl.cc
diff --git a/net/socket/ssl_client_socket_openssl.cc b/net/socket/ssl_client_socket_openssl.cc
index 8a860f35ba4fee669f8b7cf277527755f1b4b47c..e4edb255fdbddfe3cd5c442467325b6b12fee1eb 100644
--- a/net/socket/ssl_client_socket_openssl.cc
+++ b/net/socket/ssl_client_socket_openssl.cc
@@ -54,6 +54,8 @@
 #include "net/ssl/ssl_private_key.h"
 #include "net/ssl/token_binding.h"
 
+#include "base/trace_event/trace_event.h"
+
 #if !defined(OS_NACL)
 #include "net/ssl/ssl_key_logger.h"
 #endif
@@ -1483,6 +1485,7 @@ void SSLClientSocketOpenSSL::OnRecvComplete(int result) {
 }
 
 int SSLClientSocketOpenSSL::DoHandshakeLoop(int last_io_result) {
+  TRACE_EVENT0("net", "net::SSLClientSocketOpenSSL::DoHandshakeLoop");
   int rv = last_io_result;
   do {
     // Default to STATE_NONE for next state.