Oilpan: Notify supplements of Page and LocalFrame destruction.

Source/modules/geolocation/GeolocationController.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 72 matching lines @@
 GeolocationController::~GeolocationController()
 {
     ASSERT(m_observers.isEmpty());
     if (page())
         m_inspectorAgent->RemoveController(this);
 
     if (m_hasClientForTest)
         m_client->controllerForTestRemoved(this);
 }
 
+// FIXME: Oilpan: Once GeolocationClient is on-heap m_client should be a strong
+// pointer and |willBeDestroyed| can potentially be removed from Supplement.
 void GeolocationController::willBeDestroyed()
 {
     if (m_client)
         m_client->geolocationDestroyed();
 }
 
+void GeolocationController::persistentHostHasBeenDestroyed()
+{
+    observeContext(0);
+}
+
 PassOwnPtrWillBeRawPtr<GeolocationController> GeolocationController::create(LocalFrame& frame, GeolocationClient* client)
 {
     return adoptPtrWillBeNoop(new GeolocationController(frame, client));
 }
 
 void GeolocationController::addObserver(Geolocation* observer, bool enableHighAccuracy)
 {
     // This may be called multiple times with the same observer, though removeObserver()
     // is called only once with each.
     bool wasEmpty = m_observers.isEmpty();
@@ skipping 103 matching lines @@
     visitor->trace(m_highAccuracyObservers);
     WillBeHeapSupplement<LocalFrame>::trace(visitor);
 }
 
 void provideGeolocationTo(LocalFrame& frame, GeolocationClient* client)
 {
     WillBeHeapSupplement<LocalFrame>::provideTo(frame, GeolocationController::supplementName(), GeolocationController::create(frame, client));
 }
 
 } // namespace WebCore