Moving the SignalingTask class to base/test.

chrome/test/base/signaling_task.h

-// 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.
-
-// A simple callback that you can use to wait for events on a thread.
-
-#ifndef CHROME_TEST_BASE_SIGNALING_TASK_H_
-#define CHROME_TEST_BASE_SIGNALING_TASK_H_
-#pragma once
-
-#include "base/task.h"
-
-namespace base {
-class WaitableEvent;
-}
-
-class SignalingTask : public Task {
- public:
-  explicit SignalingTask(base::WaitableEvent* event);
-  virtual ~SignalingTask();
-
-  virtual void Run();
-
- private:
-  base::WaitableEvent* event_;
-};
-
-#endif  // CHROME_TEST_BASE_SIGNALING_TASK_H_