Oilpan: move WorkerGlobalScope to oilpan's heap.

Source/modules/notifications/WorkerGlobalScopeNotifications.cpp

Index: Source/modules/notifications/WorkerGlobalScopeNotifications.cpp
diff --git a/Source/modules/notifications/WorkerGlobalScopeNotifications.cpp b/Source/modules/notifications/WorkerGlobalScopeNotifications.cpp
index d2627658a3aab35185eb56bb55debdbb94c8a18b..e420fd049443f153b4698f95c2b843edf63384f7 100644
--- a/Source/modules/notifications/WorkerGlobalScopeNotifications.cpp
+++ b/Source/modules/notifications/WorkerGlobalScopeNotifications.cpp
@@ -55,7 +55,7 @@ WorkerGlobalScopeNotifications& WorkerGlobalScopeNotifications::from(WorkerGloba
     WorkerGlobalScopeNotifications* supplement = static_cast<WorkerGlobalScopeNotifications*>(WorkerSupplement::from(context, supplementName()));
     if (!supplement) {
         supplement = new WorkerGlobalScopeNotifications(context);
-        WorkerSupplement::provideTo(context, supplementName(), adoptPtr(supplement));
+        WorkerSupplement::provideTo(context, supplementName(), adoptPtrWillBeNoop(supplement));
     }
     return *supplement;
 }
@@ -72,6 +72,11 @@ NotificationCenter* WorkerGlobalScopeNotifications::webkitNotifications()
     return m_notificationCenter.get();
 }
 
+void WorkerGlobalScopeNotifications::trace(Visitor* visitor)
+{
+    visitor->trace(m_notificationCenter);
+}
+
 } // namespace WebCore
 
 #endif // ENABLE(LEGACY_NOTIFICATIONS)