Tried using CrossThreadPersistent for workerDebuggerAgents

Source/modules/geolocation/GeolocationInspectorAgent.h

Index: Source/modules/geolocation/GeolocationInspectorAgent.h
diff --git a/Source/modules/geolocation/GeolocationInspectorAgent.h b/Source/modules/geolocation/GeolocationInspectorAgent.h
index 906ae6ff3edae9ce94bffcd88f5c2f1a60695b27..c894764f95974db42c9d477f83813e71832e0881 100644
--- a/Source/modules/geolocation/GeolocationInspectorAgent.h
+++ b/Source/modules/geolocation/GeolocationInspectorAgent.h
@@ -46,8 +46,9 @@ typedef String ErrorString;
 class GeolocationInspectorAgent FINAL : public InspectorBaseAgent<GeolocationInspectorAgent>, public InspectorBackendDispatcher::GeolocationCommandHandler {
     WTF_MAKE_NONCOPYABLE(GeolocationInspectorAgent);
 public:
-    static PassOwnPtr<GeolocationInspectorAgent> create(GeolocationController*);
+    static PassOwnPtrWillBeRawPtr<GeolocationInspectorAgent> create(GeolocationController*);
     virtual ~GeolocationInspectorAgent();
+    virtual void trace(Visitor*) OVERRIDE;
 
     // Protocol methods.
     virtual void setGeolocationOverride(ErrorString*, const double*, const double*, const double*) OVERRIDE;
@@ -60,8 +61,8 @@ private:
     explicit GeolocationInspectorAgent(GeolocationController*);
     GeolocationController* m_controller;
     bool m_geolocationOverridden;
-    RefPtrWillBePersistent<GeolocationPosition> m_geolocationPosition;
-    RefPtrWillBePersistent<GeolocationPosition> m_platformGeolocationPosition;
+    RefPtrWillBeMember<GeolocationPosition> m_geolocationPosition;
+    RefPtrWillBeMember<GeolocationPosition> m_platformGeolocationPosition;
 };