Implement DeviceLight

Source/core/frame/Window.idl

Index: Source/core/frame/Window.idl
diff --git a/Source/core/frame/Window.idl b/Source/core/frame/Window.idl
index 2069b6ad34fa2d41842ff1d4e690c01d0d67a32c..04b48b134246daf10fe6150aeb5467c4d9f530d5 100644
--- a/Source/core/frame/Window.idl
+++ b/Source/core/frame/Window.idl
@@ -178,6 +178,7 @@
     [RuntimeEnabled=CSSAnimationUnprefixed] attribute EventHandler onanimationend;
     [RuntimeEnabled=CSSAnimationUnprefixed] attribute EventHandler onanimationiteration;
     [RuntimeEnabled=CSSAnimationUnprefixed] attribute EventHandler onanimationstart;
+    [RuntimeEnabled=DeviceLight] attribute EventHandler ondevicelight;

[Inactive, 2014/03/07 19:29:52]

I don't know that the policy is on this but technically, this could be part of a
partial interface in the new module, to avoid editing Window / DOMWindow in
core/. Adam, what do you think?

[abarth-chromium, 2014/03/08 06:44:19]

Does that work?  If so, we should apply it to ondevicemotion and
ondeviceorientation, etc.  it might require some changes to the code generator.

[riju_, 2014/03/10 16:17:26]

Done.

     [RuntimeEnabled=DeviceMotion] attribute EventHandler ondevicemotion;
     [RuntimeEnabled=DeviceOrientation] attribute EventHandler ondeviceorientation;
     [RuntimeEnabled=OrientationEvent] attribute EventHandler onorientationchange;