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 b8ca34175d26e2f071cce82bd09bfee66be57954..e0800b7213f71a08138e226e795a709abf41d550 100644
--- a/net/socket/ssl_client_socket_pool.cc
+++ b/net/socket/ssl_client_socket_pool.cc
@@ -16,6 +16,7 @@
 #include "base/values.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/net_errors.h"
+#include "net/base/trace_constants.h"
 #include "net/http/http_proxy_client_socket.h"
 #include "net/http/http_proxy_client_socket_pool.h"
 #include "net/log/net_log_source_type.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"));