Generic Sensor API : Ambient Light Sensor API.

device/sensor/BUILD.gn

Index: device/sensor/BUILD.gn
diff --git a/device/sensor/BUILD.gn b/device/sensor/BUILD.gn
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+++ b/device/sensor/BUILD.gn
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+# 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.
+
+import("//build/config/features.gni")
+import("//mojo/public/tools/bindings/mojom.gni")
+
+# On android, AmbientLightSensor mojo service is implemented directly in Java.
+if (!is_android) {
+  component("sensor") {
+    output_name = "device_sensor"
+
+    sources = [
+      "sensor_export.h",
+      "sensor_impl.cc",
+      "sensor_impl.h",
+      "sensor_manager.h",
+      "sensor_manager_default.cc",
+      "sensor_service.cc",
+      "sensor_service.h",
+    ]
+
+    defines = [ "DEVICE_SENSOR_IMPLEMENTATION" ]
+
+    deps = [
+      ":mojo_bindings",
+      "//base",
+      "//base/third_party/dynamic_annotations",
+      "//mojo/edk/system",
+      "//mojo/public/cpp/bindings",
+    ]
+  }
+}
+
+mojom("mojo_bindings") {
+  sources = [
+    "als_reading.mojom",
+    "sensor.mojom",
+  ]
+}