[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/modules/battery/BatteryManager.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 "modules/battery/BatteryManager.h"
 
 #include "core/dom/Document.h"
 #include "core/events/Event.h"
 #include "modules/battery/BatteryDispatcher.h"
 
 namespace blink {
 
 BatteryManager* BatteryManager::create(ExecutionContext* context)
 {
     BatteryManager* batteryManager = new BatteryManager(context);
     batteryManager->suspendIfNeeded();
     return batteryManager;
 }
 
 BatteryManager::~BatteryManager()
 {
 #if !ENABLE(OILPAN)
     stopUpdating();
 #endif
 }
 
 BatteryManager::BatteryManager(ExecutionContext* context)
-    : ActiveDOMObject(context)
+    : ActiveScriptWrappable(this)
+    , ActiveDOMObject(context)
     , PlatformEventController(toDocument(context)->page())
 {
 }
 
 ScriptPromise BatteryManager::startRequest(ScriptState* scriptState)
 {
     if (!m_batteryProperty) {
         m_batteryProperty = new BatteryProperty(scriptState->getExecutionContext(), this, BatteryProperty::Ready);
 
         // If the context is in a stopped state already, do not start updating.
@@ skipping 98 matching lines @@
 
 DEFINE_TRACE(BatteryManager)
 {
     visitor->trace(m_batteryProperty);
     PlatformEventController::trace(visitor);
     RefCountedGarbageCollectedEventTargetWithInlineData<BatteryManager>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink