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

device/generic_sensor/platform_sensor_provider_mac.cc

Index: device/generic_sensor/platform_sensor_provider_mac.cc
diff --git a/device/generic_sensor/platform_sensor_provider_mac.cc b/device/generic_sensor/platform_sensor_provider_mac.cc
index f88a34d47179e404446a16d50d3514af39963e9e..57b69c300310c1999bbbe1b83c481c24045a941d 100644
--- a/device/generic_sensor/platform_sensor_provider_mac.cc
+++ b/device/generic_sensor/platform_sensor_provider_mac.cc
@@ -7,6 +7,7 @@
 #include "base/memory/singleton.h"
 #include "device/generic_sensor/platform_sensor_accelerometer_mac.h"
 #include "device/generic_sensor/platform_sensor_ambient_light_mac.h"
+#include "device/generic_sensor/platform_sensor_fusion_relative_orientation.h"
 
 namespace device {
 
@@ -38,6 +39,11 @@ void PlatformSensorProviderMac::CreateSensorInternal(
           std::move(mapping), this));
       break;
     }
+    case mojom::SensorType::RELATIVE_ORIENTATION: {
+      base::MakeRefCounted<PlatformSensorFusionRelativeOrientation>(
+          std::move(mapping), this, callback);
+      break;
+    }
     default:
       NOTIMPLEMENTED();
       callback.Run(nullptr);