[sensors] Magnetometer sensor bindings implementation

third_party/WebKit/Source/modules/sensor/Magnetometer.cpp

+// 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.
+
+#include "modules/sensor/Magnetometer.h"
+
+#include "modules/sensor/MagnetometerReading.h"
+
+using device::mojom::blink::SensorType;
+
+namespace blink {
+
+// static
+Magnetometer* Magnetometer::create(ScriptState* scriptState,
+                                   const SensorOptions& options,
+                                   ExceptionState& exceptionState) {
+  return new Magnetometer(scriptState, options, exceptionState);
+}
+
+// static
+Magnetometer* Magnetometer::create(ScriptState* scriptState,
+                                   ExceptionState& exceptionState) {
+  return create(scriptState, SensorOptions(), exceptionState);
+}
+
+Magnetometer::Magnetometer(ScriptState* scriptState,
+                           const SensorOptions& options,
+                           ExceptionState& exceptionState)
+    : Sensor(scriptState, options, exceptionState, SensorType::MAGNETOMETER) {}
+
+MagnetometerReading* Magnetometer::reading() const {
+  return static_cast<MagnetometerReading*>(Sensor::reading());
+}
+
+std::unique_ptr<SensorReadingFactory>
+Magnetometer::createSensorReadingFactory() {
+  return std::unique_ptr<SensorReadingFactory>(
+      new SensorReadingFactoryImpl<MagnetometerReading>());

[haraken, 2016/11/16 17:33:02]

Use makeUnique.

+}
+
+DEFINE_TRACE(Magnetometer) {
+  Sensor::trace(visitor);
+}
+
+}  // namespace blink