Use event init dictionary in modules/device_light

Source/modules/device_light/DeviceLightEventInit.idl

Index: Source/modules/device_light/DeviceLightEventInit.idl
diff --git a/Source/core/frame/ScrollOptions.idl b/Source/modules/device_light/DeviceLightEventInit.idl
similarity index 54%
copy from Source/core/frame/ScrollOptions.idl
copy to Source/modules/device_light/DeviceLightEventInit.idl
index 615da4b006a4fd237594236fd4dc0940c3389773..c7245e6ee91643eedda3946bcde417d2703077ea 100644
--- a/Source/core/frame/ScrollOptions.idl
+++ b/Source/modules/device_light/DeviceLightEventInit.idl
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Spec: Non-standard
+// http://w3c.github.io/ambient-light/#idl-def-DeviceLightEvent
 
-dictionary ScrollOptions {
-    DOMString behavior;
+dictionary DeviceLightEventInit : EventInit {
+    unrestricted double value;
 };