[Sensors] 'onerror' event implementation

third_party/WebKit/Source/modules/sensor/SensorErrorEvent.cpp

 // Copyright 2016 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 "modules/sensor/SensorErrorEvent.h"
 
 #include "bindings/core/v8/V8Binding.h"
 #include <v8.h>
 
 namespace blink {
 
 SensorErrorEvent::~SensorErrorEvent() {}
 
-SensorErrorEvent::SensorErrorEvent(const AtomicString& eventType)
-    : Event(eventType,
-            true,
-            false)  // let default be bubbles but is not cancelable.
-{}
+SensorErrorEvent::SensorErrorEvent(const AtomicString& eventType,
+                                   DOMException* error)
+    : Event(eventType, false, false)  // does not bubble, is not cancelable.
+      ,
+      m_error(error) {
+  DCHECK(m_error);
+}
 
 SensorErrorEvent::SensorErrorEvent(const AtomicString& eventType,
                                    const SensorErrorEventInit& initializer)
-    : Event(eventType, initializer) {
-  setCanBubble(true);
-}
+    : Event(eventType, initializer) {}
 
 const AtomicString& SensorErrorEvent::interfaceName() const {
   return EventNames::SensorErrorEvent;
 }
 
 DEFINE_TRACE(SensorErrorEvent) {
+  visitor->trace(m_error);
   Event::trace(visitor);
 }
 
 }  // namespace blink