Generic Sensor API : Ambient Light Sensor API.

device/sensor/sensor_export.h

Index: device/sensor/sensor_export.h
diff --git a/device/sensor/sensor_export.h b/device/sensor/sensor_export.h
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index 0000000000000000000000000000000000000000..10f0855c710f0f565f409edf36828cadf5224a75
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+++ b/device/sensor/sensor_export.h
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+// Copyright (c) 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_SENSOR_DEVICE_SENSOR_EXPORT_H_
+#define DEVICE_SENSOR_DEVICE_SENSOR_EXPORT_H_
+
+#if defined(COMPONENT_BUILD)
+#if defined(WIN32)
+
+#if defined(DEVICE_SENSOR_IMPLEMENTATION)
+#define DEVICE_SENSOR_EXPORT __declspec(dllexport)
+#else
+#define DEVICE_SENSOR_EXPORT __declspec(dllimport)
+#endif  // defined(DEVICE_SENSOR_IMPLEMENTATION)
+
+#else  // defined(WIN32)
+#if defined(DEVICE_SENSOR_IMPLEMENTATION)
+#define DEVICE_SENSOR_EXPORT __attribute__((visibility("default")))
+#else
+#define DEVICE_SENSOR_EXPORT
+#endif
+#endif
+
+#else  // defined(COMPONENT_BUILD)
+#define DEVICE_SENSOR_EXPORT
+#endif
+
+#endif  // DEVICE_SENSOR_DEVICE_SENSOR_EXPORT_H_