[sensors] Magnetometer sensor bindings implementation

third_party/WebKit/Source/modules/sensor/Magnetometer.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 Magnetometer_h
+#define Magnetometer_h
+
+#include "modules/sensor/Sensor.h"
+
+namespace blink {
+
+class MagnetometerReading;
+
+class Magnetometer final : public Sensor {
+  DEFINE_WRAPPERTYPEINFO();
+
+ public:
+  static Magnetometer* create(ScriptState*,
+                              const SensorOptions&,
+                              ExceptionState&);
+  static Magnetometer* create(ScriptState*, ExceptionState&);
+
+  MagnetometerReading* reading() const;
+
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  Magnetometer(ScriptState*, const SensorOptions&, ExceptionState&);
+  // Sensor overrides.
+  std::unique_ptr<SensorReadingFactory> createSensorReadingFactory() override;
+};
+
+}  // namespace blink
+
+#endif  // Magnetometer_h