Revert of chromeos: Add CPU temperature reader

chromeos/system/cpu_temperature_reader.h

-// Copyright 2017 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 CHROMEOS_SYSTEM_CPU_TEMPERATURE_READER_H_
-#define CHROMEOS_SYSTEM_CPU_TEMPERATURE_READER_H_
-
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "base/files/file_path.h"
-#include "base/macros.h"
-
-namespace chromeos {
-namespace system {
-
-// Used to read CPU temperature info from sysfs hwmon.
-class CPUTemperatureReader {
- public:
-  // Contains info from a CPU temperature sensor.
-  struct CPUTemperatureInfo {
-    CPUTemperatureInfo();
-    ~CPUTemperatureInfo();
-
-    bool operator<(const CPUTemperatureInfo& other) const {
-      return std::make_pair(label, temp_celsius) <
-             std::make_pair(other.label, other.temp_celsius);
-    }
-
-    // The temperature read by a CPU temperature sensor in degrees Celsius.
-    double temp_celsius;
-
-    // The name of the CPU temperature zone monitored by this sensor. Used to
-    // identify the source of each temperature reading. Taken from sysfs "name"
-    // or "label" field, if it exists.
-    std::string label;
-  };
-
-  CPUTemperatureReader();
-  ~CPUTemperatureReader();
-
-  void set_hwmon_dir_for_test(const base::FilePath& dir) { hwmon_dir_ = dir; }
-
-  // Reads temperature from each thermal sensor of the CPU. Returns a vector
-  // containing a reading from each sensor. This is a blocking function that
-  // should be run on a thread that allows blocking operations.
-  std::vector<CPUTemperatureInfo> GetCPUTemperatures();
-
- private:
-  // Sysfs hwmon directory path.
-  base::FilePath hwmon_dir_;
-
-  DISALLOW_COPY_AND_ASSIGN(CPUTemperatureReader);
-};
-
-}  // namespace system
-}  // namespace chromeos
-
-#endif  // CHROMEOS_SYSTEM_CPU_TEMPERATURE_READER_H_