chromeos: Add CHROMEOS_EXPORT to CPUTemperatureReader

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"
+#include "chromeos/chromeos_export.h"
 
 namespace chromeos {
 namespace system {
 
 // Used to read CPU temperature info from sysfs hwmon.
-class CPUTemperatureReader {
+class CHROMEOS_EXPORT 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);
     }
@@ skipping 21 matching lines @@
   // Sysfs hwmon directory path.
   base::FilePath hwmon_dir_;
 
   DISALLOW_COPY_AND_ASSIGN(CPUTemperatureReader);
 };
 
 }  // namespace system
 }  // namespace chromeos
 
 #endif  // CHROMEOS_SYSTEM_CPU_TEMPERATURE_READER_H_