Update from https://crrev.com/312398

base/win/message_window.cc

Index: base/win/message_window.cc
diff --git a/base/win/message_window.cc b/base/win/message_window.cc
index 57fe64c798116af07672f8fd14aa43367837e384..0b4b29f5aa60bebcce79e0081fe0caface38587a 100644
--- a/base/win/message_window.cc
+++ b/base/win/message_window.cc
@@ -7,6 +7,7 @@
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/process/memory.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/win/wrapped_window_proc.h"
 
 const wchar_t kMessageWindowClassName[] = L"Chrome_MessageWindow";
@@ -120,6 +121,10 @@ LRESULT CALLBACK MessageWindow::WindowProc(HWND hwnd,
                                            UINT message,
                                            WPARAM wparam,
                                            LPARAM lparam) {
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/440919 is fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION("440919 MessageWindow::WindowProc"));
+
   MessageWindow* self = reinterpret_cast<MessageWindow*>(
       GetWindowLongPtr(hwnd, GWLP_USERDATA));