Standardize "net" category trace events

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 b6cb5cd2ab9b67edc9d361091dbbc34f0d12fac7..f97fcc76fd93699e72473433aaaa3d23ce92a7f5 100644
--- a/net/socket/ssl_client_socket_pool.cc
+++ b/net/socket/ssl_client_socket_pool.cc
@@ -20,6 +20,7 @@
 #include "net/http/http_proxy_client_socket_pool.h"
 #include "net/log/net_log_source_type.h"
 #include "net/log/net_log_with_source.h"
+#include "net/log/trace_constants.h"
 #include "net/socket/client_socket_factory.h"
 #include "net/socket/client_socket_handle.h"
 #include "net/socket/socks_client_socket_pool.h"
@@ -176,7 +177,7 @@ void SSLConnectJob::OnIOComplete(int result) {
 }
 
 int SSLConnectJob::DoLoop(int result) {
-  TRACE_EVENT0("net", "SSLConnectJob::DoLoop");
+  TRACE_EVENT0(kNetTracingCategory, "SSLConnectJob::DoLoop");
   DCHECK_NE(next_state_, STATE_NONE);
 
   int rv = result;
@@ -294,7 +295,7 @@ int SSLConnectJob::DoTunnelConnectComplete(int result) {
 }
 
 int SSLConnectJob::DoSSLConnect() {
-  TRACE_EVENT0("net", "SSLConnectJob::DoSSLConnect");
+  TRACE_EVENT0(kNetTracingCategory, "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"));