[NOT FOR LANDING] Detailed loading traces

content/browser/loader/redirect_to_file_resource_handler.cc

Index: content/browser/loader/redirect_to_file_resource_handler.cc
diff --git a/content/browser/loader/redirect_to_file_resource_handler.cc b/content/browser/loader/redirect_to_file_resource_handler.cc
index 670b3343d305d2cce1a7000d2e404ca181ead5e5..2ab5a82c5b61f67eed19a06e80e13757ebac83ac 100644
--- a/content/browser/loader/redirect_to_file_resource_handler.cc
+++ b/content/browser/loader/redirect_to_file_resource_handler.cc
@@ -5,6 +5,7 @@
 #include "content/browser/loader/redirect_to_file_resource_handler.h"
 
 #include <utility>
+#include "base/trace_event/trace_event.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ -143,6 +144,9 @@ RedirectToFileResourceHandler::RedirectToFileResourceHandler(
       weak_factory_(this) {}
 
 RedirectToFileResourceHandler::~RedirectToFileResourceHandler() {
+  TRACE_EVENT0("toplevel",
+               "RedirectToFileResourceHandler::~RedirectToFileResourceHandler");
+
   // Orphan the writer to asynchronously close and release the temporary file.
   if (writer_) {
     writer_->Close();
@@ -165,6 +169,7 @@ bool RedirectToFileResourceHandler::OnResponseStarted(
 }
 
 bool RedirectToFileResourceHandler::OnWillStart(const GURL& url, bool* defer) {
+  TRACE_EVENT0("toplevel", "RedirectToFileResourceHandler::OnWillStart");
   DCHECK(!writer_);
 
   // Defer starting the request until we have created the temporary file.