Generic Sensor API : Ambient Light Sensor API.

third_party/WebKit/Source/modules/sensor/SensorState.h

Index: third_party/WebKit/Source/modules/sensor/SensorState.h
diff --git a/third_party/WebKit/Source/modules/sensor/SensorState.h b/third_party/WebKit/Source/modules/sensor/SensorState.h
new file mode 100644
index 0000000000000000000000000000000000000000..91269a84a2b1dcd9dda0cd12ef771d428b77d40c
--- /dev/null
+++ b/third_party/WebKit/Source/modules/sensor/SensorState.h
@@ -0,0 +1,19 @@
+// 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 SensorState_h
+#define SensorState_h
+
+namespace blink {
+
+enum class SensorState {
+    Idle,
+    Activating,
+    Active,
+    Errored
+};
+
+} // namespace blink
+
+#endif // SensorState_h