Instrumenting NetworkChangeNotifierWin::GetCurrentConnectionType for jank

We suspect that this method may be causing jankiness of QuicClientSession constructor

BUG=422516

Review URL: https://codereview.chromium.org/879943003

Cr-Commit-Position: refs/heads/master@{#313427}

net/base/network_change_notifier_win.cc

@@ -208,6 +208,11 @@ NetworkChangeNotifierWin::RecomputeCurrentConnectionType() const {
 
 NetworkChangeNotifier::ConnectionType
 NetworkChangeNotifierWin::GetCurrentConnectionType() const {
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 NetworkChangeNotifierWin::GetCurrentConnectionType"));
+
   base::AutoLock auto_lock(last_computed_connection_type_lock_);
   return last_computed_connection_type_;
 }