[NOT FOR LANDING] Detailed loading traces

content/browser/loader/mime_type_resource_handler.cc

Index: content/browser/loader/mime_type_resource_handler.cc
diff --git a/content/browser/loader/mime_type_resource_handler.cc b/content/browser/loader/mime_type_resource_handler.cc
index c9a9bb89be39254ca2bc9151a68a7b49b47a9141..ac2cc1530a21bc28b6d34d7aad115500a00fdbcb 100644
--- a/content/browser/loader/mime_type_resource_handler.cc
+++ b/content/browser/loader/mime_type_resource_handler.cc
@@ -7,6 +7,7 @@
 #include <utility>
 #include <vector>
 
+#include "base/trace_event/trace_event.h"
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ -97,6 +98,7 @@ MimeTypeResourceHandler::MimeTypeResourceHandler(
       weak_ptr_factory_(this) {}
 
 MimeTypeResourceHandler::~MimeTypeResourceHandler() {
+  TRACE_EVENT0("toplevel", "MimeTypeResourceHandler::~MimeTypeResourceHandler");
 }
 
 void MimeTypeResourceHandler::SetController(ResourceController* controller) {