Use event init dictionary in modules/device_light

Source/modules/device_light/DeviceLightEvent.h

Index: Source/modules/device_light/DeviceLightEvent.h
diff --git a/Source/modules/device_light/DeviceLightEvent.h b/Source/modules/device_light/DeviceLightEvent.h
index c90607cc80fbc7a8331614fd65dc19e8e2d29160..3632c40b13f1ff8937e39782aba6a6695f889a6e 100644
--- a/Source/modules/device_light/DeviceLightEvent.h
+++ b/Source/modules/device_light/DeviceLightEvent.h
@@ -6,20 +6,11 @@
 #define DeviceLightEvent_h
 
 #include "modules/EventModules.h"
+#include "modules/device_light/DeviceLightEventInit.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
-struct DeviceLightEventInit : public EventInit {
-    DeviceLightEventInit()
-        : value(std::numeric_limits<double>::infinity())
-    {
-        bubbles = true;
-    };
-
-    double value;
-};
-
 class DeviceLightEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public: