process all ui events before posting closure because menu depends

chrome/test/base/view_event_test_base.cc

 // Copyright (c) 2011 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 "chrome/test/base/view_event_test_base.h"
 
 #if defined(OS_WIN)
 #include <ole2.h>
 #endif
 
@@ skipping 52 matching lines @@
   method_factory_.RevokeAll();
 
   MessageLoop::current()->Quit();
 
 #if defined(OS_WIN)
   // We need to post a message to tickle the Dispatcher getting called and
   // exiting out of the nested loop. Without this the quit never runs.
   PostMessage(window_->GetNativeWindow(), WM_USER, 0, 0);
 #endif
 
-  // If we're in a nested message loop, as is the case with menus, we need
-  // to quit twice. The second quit does that for us.
-  MessageLoop::current()->PostTask(FROM_HERE, MessageLoop::QuitClosure());
+  // If we're in a nested message loop, as is the case with menus, we
+  // need to quit twice. The second quit does that for us. Finish all
+  // pending UI events before posting closure because events it may be
+  // executed before UI events are executed.
+  ui_controls::RunClosureAfterAllPendingUIEvents(MessageLoop::QuitClosure());
 }
 
 void ViewEventTestBase::SetUp() {
 #if defined(OS_WIN)
   OleInitialize(NULL);
 #endif
   window_ = views::Widget::CreateWindow(this);
 }
 
 void ViewEventTestBase::TearDown() {
@@ skipping 77 matching lines @@
   dnd_thread_.reset(NULL);
 }
 
 void ViewEventTestBase::RunTestMethod(const base::Closure& task) {
   StopBackgroundThread();
 
   task.Run();
   if (HasFatalFailure())
     Done();
 }