Not counting nested loops as time spent in a task

ui/gfx/win/hwnd_util.cc

Index: ui/gfx/win/hwnd_util.cc
diff --git a/ui/gfx/win/hwnd_util.cc b/ui/gfx/win/hwnd_util.cc
index 41eead48f8d9809b76664cee6d040f27f0efa571..98d71af7ac6641749861ff361fadfe1697354609 100644
--- a/ui/gfx/win/hwnd_util.cc
+++ b/ui/gfx/win/hwnd_util.cc
@@ -6,6 +6,7 @@
 
 #include "base/i18n/rtl.h"
 #include "base/strings/string_util.h"
+#include "base/tracked_objects.h"
 #include "base/win/metro.h"
 #include "base/win/win_util.h"
 #include "ui/gfx/point.h"
@@ -222,8 +223,15 @@ void ShowSystemMenuAtPoint(HWND window, const Point& point) {
   if (base::i18n::IsRTL())
     flags |= TPM_RIGHTALIGN;
   HMENU menu = GetSystemMenu(window, FALSE);
+
+  // Use task stopwatch to exclude the time while the context menu is open from
+  // the current task, if any.
+  tracked_objects::TaskStopwatch stopwatch;
+  stopwatch.Start();
   const int command =
       TrackPopupMenu(menu, flags, point.x(), point.y(), 0, window, NULL);
+  stopwatch.Stop();
+
   if (command)
     SendMessage(window, WM_SYSCOMMAND, command, 0);
 }