Not counting nested loops as time spent in a task

ui/gfx/win/hwnd_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/win/hwnd_util.h"
 
 #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"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 
 namespace gfx {
 
 namespace {
 
@@ skipping 196 matching lines @@
 }
 
 void ShowSystemMenuAtPoint(HWND window, const Point& point) {
   // In the Metro process, we never want to show the system menu.
   if (base::win::IsMetroProcess())
     return;
   UINT flags = TPM_LEFTBUTTON | TPM_RIGHTBUTTON | TPM_RETURNCMD;
   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);
 }
 
 extern "C" {
   typedef HWND (*RootWindow)();
 }
 
 HWND GetWindowToParentTo(bool get_real_hwnd) {
   HMODULE metro = base::win::GetMetroModule();
   if (!metro)
     return get_real_hwnd ? ::GetDesktopWindow() : HWND_DESKTOP;
   // In windows 8 metro-mode the root window is not the desktop.
   RootWindow root_window =
       reinterpret_cast<RootWindow>(::GetProcAddress(metro, "GetRootWindow"));
   return root_window();
 }
 
 }  // namespace gfx