[sensors] [mac] Implement ambient light sensor for macOS

content/browser/device_sensors/ambient_light_mac.cc

Index: content/browser/device_sensors/ambient_light_mac.cc
diff --git a/content/browser/device_sensors/ambient_light_mac.cc b/content/browser/device_sensors/ambient_light_mac.cc
deleted file mode 100644
index c6606791bd35ef399d186bc46e84c336f61f51a4..0000000000000000000000000000000000000000
--- a/content/browser/device_sensors/ambient_light_mac.cc
+++ /dev/null
@@ -1,80 +0,0 @@
-// Copyright 2015 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.
-
-// This file is based on http://osxbook.com/book/bonus/chapter10/light/
-
-#include "content/browser/device_sensors/ambient_light_mac.h"
-
-#include <utility>
-
-#include "base/mac/scoped_cftyperef.h"
-#include "base/mac/scoped_ioobject.h"
-
-namespace content {
-
-namespace {
-enum LmuFunctionIndex {
-  kGetSensorReadingID = 0,  // getSensorReading(int *, int *)
-  kGetLEDBrightnessID = 1,  // getLEDBrightness(int, int *)
-  kSetLEDBrightnessID = 2,  // setLEDBrightness(int, int, int *)
-  kSetLEDFadeID = 3,        // setLEDFade(int, int, int, int *)
-};
-}  // namespace
-
-// static
-std::unique_ptr<AmbientLightSensor> AmbientLightSensor::Create() {
-  std::unique_ptr<AmbientLightSensor> light_sensor(new AmbientLightSensor);
-  return light_sensor->Init() ? std::move(light_sensor) : nullptr;
-}
-
-AmbientLightSensor::~AmbientLightSensor() {
-  if (!io_connection_)
-    IOServiceClose(io_connection_);
-}
-
-AmbientLightSensor::AmbientLightSensor() : io_connection_(IO_OBJECT_NULL) {
-}
-
-bool AmbientLightSensor::Init() {
-  // Tested and verified by riju that the following call works on
-  // MacBookPro9,1 : Macbook Pro 15" (Mid 2012 model)
-  // MacBookPro10,1 : Macbook Pro 15" (Retina Display, Early 2013 model).
-  // MacBookPro10,2 : Macbook Pro 13" (Retina Display, Early 2013 model).
-  // MacBookAir5,2 : Macbook Air 13" (Mid 2012 model) (by François Beaufort).
-  // MacBookAir6,2 : Macbook Air 13" (Mid 2013 model).
-  // Testing plans : please download the code and follow the comments :-
-  // https://gist.github.com/riju/74af8c81a665e412d122/
-  // and add an entry here about the model and the status returned by the code.
-
-  // Look up a registered IOService object whose class is AppleLMUController.
-  base::mac::ScopedIOObject<io_service_t> service_object(
-      IOServiceGetMatchingService(kIOMasterPortDefault,
-                                  IOServiceMatching("AppleLMUController")));
-
-  // Return early if the ambient light sensor is not present.
-  if (!service_object)
-    return false;
-
-  // Create a connection to the IOService object.
-  kern_return_t kr =
-      IOServiceOpen(service_object, mach_task_self(), 0, &io_connection_);
-
-  // IOServiceOpen error.
-  if (kr != KERN_SUCCESS || io_connection_ == IO_OBJECT_NULL)
-    return false;
-
-  uint64_t lux_values[2];
-  return ReadSensorValue(lux_values);
-}
-
-bool AmbientLightSensor::ReadSensorValue(uint64_t lux_values[2]) {
-  uint32_t scalar_output_count = 2;
-  kern_return_t kr = IOConnectCallMethod(
-      io_connection_, LmuFunctionIndex::kGetSensorReadingID, nullptr, 0,
-      nullptr, 0, lux_values, &scalar_output_count, nullptr, 0);
-
-  return kr == KERN_SUCCESS;
-}
-
-}  // namespace content