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

device/base/device_sensors_consts.h

Index: device/base/device_sensors_consts.h
diff --git a/device/base/device_sensors_consts.h b/device/base/device_sensors_consts.h
new file mode 100644
index 0000000000000000000000000000000000000000..e64acf34d0767b83bdf967b7b14da197ce9f153c
--- /dev/null
+++ b/device/base/device_sensors_consts.h
@@ -0,0 +1,15 @@
+// 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 DEVICE_BASE_DEVICE_SENSORS_CONSTS_H_
+#define DEVICE_BASE_DEVICE_SENSORS_CONSTS_H_
+
+namespace device {
+
+// Default rate for returning value of the ambient light sensor.
+const int kDefaultAmbientLightFrequencyHz = 5;

[Reilly Grant (use Gerrit), 2016/10/04 07:11:27]

I recommend putting this in //device/generic_sensors/sensors_consts.h.

+
+}  // namespace device
+
+#endif  // DEVICE_BASE_DEVICE_SENSORS_CONSTS_H_