Use event init dictionary in modules/device_light

LayoutTests/fast/dom/DeviceLight/create-event.html

Index: LayoutTests/fast/dom/DeviceLight/create-event.html
diff --git a/LayoutTests/fast/dom/DeviceLight/create-event.html b/LayoutTests/fast/dom/DeviceLight/create-event.html
index a8727f471137f7217b7157ff78b4f1a8a0a2b252..f69a2dbe38fade3944b6e8d59635990fe4e1a3d3 100644
--- a/LayoutTests/fast/dom/DeviceLight/create-event.html
+++ b/LayoutTests/fast/dom/DeviceLight/create-event.html
@@ -31,7 +31,7 @@ shouldBeFalse("newEvent.cancelable")
 shouldBeTrue("typeof newEvent.value == 'number'");
 shouldBeEqualToNumber('newEvent.value', 10);
 
-shouldBeTrue("defaultEvent.bubbles");
+shouldBeFalse("defaultEvent.bubbles");

[timvolodine, 2014/12/03 12:37:50]

unless I am missing something the spec explicitly states that the event should
bubble, see http://w3c.github.io/ambient-light/..

[bashi, 2014/12/04 23:40:52]

It seems that I forgot to put a comment to describe this change (I wrote it in
the initial PS, but deleted it before actual review). Sorry for the confusion.

I think it should be configurable by scripts, as all other interfaces which
inherit from Event allow to do so.

The spec says:

"When a user agent is required to fire a device light event, the user agent must
run the following steps:

1. Create an event that uses the DeviceLightEvent interface, with the name
devicelight, which bubbles, is not cancelable, and has no default action, that
also meets the following conditions ..."

However, EventInits are used by scripts(not UA), and they should be able to
control 'bubbles' and 'cancelable'. Note that you can force DeviceEvent's
bubbles always to be true when you create it in Blink, with
DeviceEventInit.bubbles = true, or by calling another constructor.

If the spec really wants to make the event's bubbles be always true, I'll revise
the CL.

[timvolodine, 2014/12/09 14:49:29]

I did not write the spec :/, I was looking at
http://w3c.github.io/ambient-light/#idl-def-DeviceLightEvent.
so according to that bubbles should be true.

you can contact the authors if in doubt: Anssi Kostiainen who is at intel would
be a good guess I think. btw a developer who implemented Device Light API is one
of the reviewers:
riju_@ what do you think?

[bashi, 2014/12/10 00:06:06]

Hmm, my point was "a user agent" is different from "scripts".

It seems that it would be better to keep the behavior, so I revised the CL.
Could you take another look? Thanks!

 shouldBeFalse("defaultEvent.cancelable");
 </script>
 </body>