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

third_party/WebKit/Source/modules/battery/BatteryManager.cpp

Index: third_party/WebKit/Source/modules/battery/BatteryManager.cpp
diff --git a/third_party/WebKit/Source/modules/battery/BatteryManager.cpp b/third_party/WebKit/Source/modules/battery/BatteryManager.cpp
index 5304ce54412e34ada73923ee72880128abdcb38d..060a7ad417c790bc43aecd792f0489b245a11813 100644
--- a/third_party/WebKit/Source/modules/battery/BatteryManager.cpp
+++ b/third_party/WebKit/Source/modules/battery/BatteryManager.cpp
@@ -25,7 +25,8 @@ BatteryManager::~BatteryManager()
 }
 
 BatteryManager::BatteryManager(ExecutionContext* context)
-    : ActiveDOMObject(context)
+    : ActiveScriptWrappable(this)
+    , ActiveDOMObject(context)
     , PlatformEventController(toDocument(context)->page())
 {
 }