Update from https://crrev.com/315085

net/http/http_stream_factory_impl_job.cc

Index: net/http/http_stream_factory_impl_job.cc
diff --git a/net/http/http_stream_factory_impl_job.cc b/net/http/http_stream_factory_impl_job.cc
index 45a0970b767dccd5723e8da6f2a6858a95b0863e..8729dfbba293736b550fd70027c9852804520ffa 100644
--- a/net/http/http_stream_factory_impl_job.cc
+++ b/net/http/http_stream_factory_impl_job.cc
@@ -10,6 +10,7 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ -436,6 +437,10 @@ int HttpStreamFactoryImpl::Job::OnHostResolution(
 }
 
 void HttpStreamFactoryImpl::Job::OnIOComplete(int result) {
+  // TODO(pkasting): Remove ScopedTracker below once crbug.com/455884 is fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "455884 HttpStreamFactoryImpl::Job::OnIOComplete"));
   RunLoop(result);
 }