Add RELATIVE_ORIENTATION sensor implementation on macOS to //device/generic_sensor

device/generic_sensor/relative_orientation_fusion_algorithm.cc

+// 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.
+
+#include "device/generic_sensor/relative_orientation_fusion_algorithm.h"
+
+namespace device {
+
+RelativeOrientationFusionAlgorithm::RelativeOrientationFusionAlgorithm() {}

[Mikhail, 2017/06/21 11:10:00]

acceleration_x_ and other members are left uninitialized,
better define ctor as "= default"

[juncai, 2017/07/20 00:22:16]

These member variables don't exist in the new CL:
https://chromium-review.googlesource.com/c/578253/

+
+RelativeOrientationFusionAlgorithm::~RelativeOrientationFusionAlgorithm() {}
+
+}  // namespace device