[NOT FOR LANDING] Detailed loading traces

chrome/browser/net/connect_interceptor.cc

Index: chrome/browser/net/connect_interceptor.cc
diff --git a/chrome/browser/net/connect_interceptor.cc b/chrome/browser/net/connect_interceptor.cc
index 40bf61ce876094ae785fc5df95dd1ce7ec75706c..8df898b26cdd4f2905d70681cc719e634f9b7eb3 100644
--- a/chrome/browser/net/connect_interceptor.cc
+++ b/chrome/browser/net/connect_interceptor.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/net/connect_interceptor.h"
 
+#include "base/trace_event/trace_event.h"
 #include "chrome/browser/net/predictor.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/common/resource_type.h"
@@ -23,6 +24,8 @@ ConnectInterceptor::~ConnectInterceptor() {
 }
 
 void ConnectInterceptor::WitnessURLRequest(net::URLRequest* request) {
+  TRACE_EVENT0("toplevel", "ConnectInterceptor::WitnessURLRequest");
+
   GURL request_scheme_host(Predictor::CanonicalizeUrl(request->url()));
   if (request_scheme_host == GURL::EmptyGURL())
     return;