[sensors] Ambient light sensor bindings implementation

third_party/WebKit/Source/modules/sensor/AmbientLightSensor.idl

Index: third_party/WebKit/Source/modules/sensor/AmbientLightSensor.idl
diff --git a/third_party/WebKit/Source/modules/sensor/AmbientLightSensor.idl b/third_party/WebKit/Source/modules/sensor/AmbientLightSensor.idl
new file mode 100644
index 0000000000000000000000000000000000000000..eb3daf810da018d4d201c8d1cdb53df83b808c23
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+++ b/third_party/WebKit/Source/modules/sensor/AmbientLightSensor.idl
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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.
+
+// Specification at:
+// https://w3c.github.io/ambient-light/#ambient-light-sensor-interface
+
+[
+    RuntimeEnabled=Sensor,
+    Constructor(optional SensorOptions sensorOptions),
+    ConstructorCallWith=ExecutionContext,
+] interface AmbientLightSensor : Sensor {
+    readonly attribute AmbientLightSensorReading? reading;
+};