Reland of [sensors] Ambient light sensor implementation for ChromeOS and Linux.

device/generic_sensor/linux/sensor_data_linux.h

Index: device/generic_sensor/linux/sensor_data_linux.h
diff --git a/device/generic_sensor/linux/sensor_data_linux.h b/device/generic_sensor/linux/sensor_data_linux.h
new file mode 100644
index 0000000000000000000000000000000000000000..e45d992d7c6cb7e39d5a49db94235dc714993f36
--- /dev/null
+++ b/device/generic_sensor/linux/sensor_data_linux.h
@@ -0,0 +1,38 @@
+// 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 DEVICE_GENERIC_SENSOR_LINUX_SENSOR_DATA_LINUX_H_
+#define DEVICE_GENERIC_SENSOR_LINUX_SENSOR_DATA_LINUX_H_
+
+#include "device/generic_sensor/generic_sensor_export.h"
+#include "device/generic_sensor/public/interfaces/sensor.mojom.h"
+
+namespace device {
+
+// This structure represents a context that is used to
+// create a type specific SensorReader and a concrete
+// sensor that uses the SensorReader to read sensor
+// data from files specified in the |sensor_file_names|.
+struct DEVICE_GENERIC_SENSOR_EXPORT SensorDataLinux {
+  SensorDataLinux();
+  ~SensorDataLinux();
+  SensorDataLinux(const SensorDataLinux& other);
+  // Provides a base path to all sensors.
+  const base::FilePath::CharType* base_path_sensor_linux;
+  // Provides an array of sensor file names to be searched for.
+  // Different sensors might have up to 3 different file name arrays.
+  // One file must be found from each array.
+  std::vector<std::vector<std::string>> sensor_file_names;
+  // Reporting mode of a sensor.
+  mojom::ReportingMode reporting_mode;
+  // Default configuration of a sensor.
+  PlatformSensorConfiguration default_configuration;
+};
+
+// Initializes a sensor type specific data.
+bool InitSensorData(mojom::SensorType type, SensorDataLinux* data);
+
+}  // namespace device
+
+#endif  // DEVICE_GENERIC_SENSOR_LINUX_SENSOR_DATA_LINUX_H_