change the way windows are parented when their parent is set to NULL.

views/test/views_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 "views/test/views_test_base.h"
 
 #if defined(OS_WIN)
 #include <ole2.h>
 #endif
 
@@ skipping 26 matching lines @@
       << "You have overridden SetUp but never called super class's SetUp";
   CHECK(teardown_called_)
       << "You have overrideen TearDown but never called super class's TearDown";
 }
 
 void ViewsTestBase::SetUp() {
   testing::Test::SetUp();
   setup_called_ = true;
 #if defined(USE_AURA)
   aura::Desktop::set_compositor_factory_for_testing(&TestCreateCompositor);
-  if (!aura::Desktop::GetInstance()->default_parent())
-    aura::Desktop::GetInstance()->CreateDefaultParentForTesting();
 #else
   Widget::set_compositor_factory_for_testing(&TestCreateCompositor);
 #endif
   if (!views_delegate_.get())
     views_delegate_.reset(new TestViewsDelegate());
 }
 
 void ViewsTestBase::TearDown() {
   // Flush the message loop because we have pending release tasks
   // and these tasks if un-executed would upset Valgrind.
@@ skipping 11 matching lines @@
 void ViewsTestBase::RunPendingMessages() {
 #if defined(USE_AURA)
   message_loop_.RunAllPendingWithDispatcher(
       aura::Desktop::GetInstance()->GetDispatcher());
 #else
   message_loop_.RunAllPending();
 #endif
 }
 
 }  // namespace views