Use event init dictionary in modules/device_light

Source/modules/device_light/DeviceLightEvent.cpp

 // Copyright 2014 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.
 
 #include "config.h"
 #include "modules/device_light/DeviceLightEvent.h"
 
 namespace blink {
 
 DeviceLightEvent::~DeviceLightEvent()
 {
 }
 
 DeviceLightEvent::DeviceLightEvent()
     : m_value(std::numeric_limits<double>::infinity())
 {
 }
 
 DeviceLightEvent::DeviceLightEvent(const AtomicString& eventType, double value)
     : Event(eventType, true, false) // The DeviceLightEvent bubbles but is not cancelable.
     , m_value(value)
 {
 }
 
 DeviceLightEvent::DeviceLightEvent(const AtomicString& eventType, const DeviceLightEventInit& initializer)
     : Event(eventType, initializer)
-    , m_value(initializer.value)
+    , m_value(initializer.hasValue() ? initializer.value() : std::numeric_limits<double>::infinity())
 {
+    setCanBubble(true);
 }
 
 const AtomicString& DeviceLightEvent::interfaceName() const
 {
     return EventNames::DeviceLightEvent;
 }
 
 } // namespace blink