Extract touchscreen device management into a generic manager

ash/test/ash_test_base.h

 // 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.
 
 #ifndef ASH_TEST_ASH_TEST_BASE_H_
 #define ASH_TEST_ASH_TEST_BASE_H_
 
 #include <string>
 
+#include "base/at_exit.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/wm/public/window_types.h"
 
 #if defined(OS_WIN)
 #include "ui/base/win/scoped_ole_initializer.h"
@@ skipping 99 matching lines @@
   void SetCanLockScreen(bool can_lock_screen);
   void SetShouldLockScreenBeforeSuspending(bool should_lock);
   void SetUserAddingScreenRunning(bool user_adding_screen_running);
 
   // Methods to emulate blocking and unblocking user session with given
   // |block_reason|.
   void BlockUserSession(UserSessionBlockReason block_reason);
   void UnblockUserSession();
 
  private:
+  base::ShadowingAtExitManager at_exit_;
   bool setup_called_;
   bool teardown_called_;
   // |SetUp()| doesn't activate session if this is set to false.
   bool start_session_;
   scoped_ptr<content::TestBrowserThreadBundle> thread_bundle_;
   scoped_ptr<AshTestHelper> ash_test_helper_;
   scoped_ptr<aura::test::EventGenerator> event_generator_;
 #if defined(OS_WIN)
   // Note that the order is important here as ipc_thread_ should be destroyed
   // after metro_viewer_host_->channel_.
@@ skipping 13 matching lines @@
   virtual ~NoSessionAshTestBase() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NoSessionAshTestBase);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_ASH_TEST_BASE_H_