Oilpan: move BatteryStatus to the heap.

Source/modules/battery/BatteryManager.cpp

Index: Source/modules/battery/BatteryManager.cpp
diff --git a/Source/modules/battery/BatteryManager.cpp b/Source/modules/battery/BatteryManager.cpp
index 7e633fa3e6d6c8503fe1b876f5b9705e2fff9fb2..7be6038a26e2b292c02067a2ccb9ba33c8e96dd1 100644
--- a/Source/modules/battery/BatteryManager.cpp
+++ b/Source/modules/battery/BatteryManager.cpp
@@ -76,11 +76,13 @@ void BatteryManager::didUpdateData()
     ASSERT(RuntimeEnabledFeatures::batteryStatusEnabled());
     ASSERT(m_state != NotStarted);
 
-    RefPtr<BatteryStatus> oldStatus = m_batteryStatus;
+    RefPtrWillBeRawPtr<BatteryStatus> oldStatus = m_batteryStatus;
     m_batteryStatus = BatteryDispatcher::instance().latestData();
 
+#if !ENABLE(OILPAN)
     // BatteryDispatcher also holds a reference to m_batteryStatus.
     ASSERT(m_batteryStatus->refCount() > 1);
+#endif
 
     if (m_state == Pending) {
         ASSERT(m_resolver);
@@ -138,4 +140,10 @@ void BatteryManager::stop()
     stopUpdating();
 }
 
+void BatteryManager::trace(Visitor* visitor)
+{
+    visitor->trace(m_batteryStatus);
+    EventTargetWithInlineData::trace(visitor);
+}
+
 } // namespace WebCore