Revert of GPU Watchdog to check I/O before terminating GPU process

content/common/gpu_watchdog_utils.h

-// Copyright 2016 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 CONTENT_COMMON_GPU_WATCHDOG_UTILS_H_
-#define CONTENT_COMMON_GPU_WATCHDOG_UTILS_H_
-
-#include "content/common/content_export.h"
-
-namespace base {
-class FilePath;
-}  // namespace base
-
-namespace content {
-
-// Gets temporary file used by GPU watchdog thread.
-// Returns false if temporary directory path can't be obtained.
-CONTENT_EXPORT bool GetGpuWatchdogTempFile(base::FilePath* file_path);
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_GPU_WATCHDOG_UTILS_H_