DOMDataStore should be cleared when shutting down worker threads

Source/bindings/v8/V8PerContextData.h

 /*
  * Copyright (C) 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 43 matching lines @@
 typedef WTF::Vector<V8NPObject*> V8NPObjectVector;
 typedef WTF::HashMap<int, V8NPObjectVector> V8NPObjectMap;
 
 enum V8ContextEmbedderDataField {
     v8ContextDebugIdIndex = static_cast<int>(gin::kDebugIdIndex),
     v8ContextPerContextDataIndex = static_cast<int>(gin::kPerContextDataStartIndex + gin::kEmbedderBlink),
 };
 
 class V8PerContextData {
 public:
-    static PassOwnPtr<V8PerContextData> create(v8::Handle<v8::Context> context, DOMWrapperWorld* world)
+    static PassOwnPtr<V8PerContextData> create(v8::Handle<v8::Context> context, PassRefPtr<DOMWrapperWorld> world)
     {
         return adoptPtr(new V8PerContextData(context, world));
     }
 
     static V8PerContextData* from(v8::Handle<v8::Context>);
     static DOMWrapperWorld* world(v8::Handle<v8::Context>);
 
     ~V8PerContextData();
 
     v8::Handle<v8::Context> context() { return m_context.newLocal(m_isolate); }
@@ skipping 19 matching lines @@
 
     V8NPObjectMap* v8NPObjectMap() { return &m_v8NPObjectMap; }
     V8DOMActivityLogger* activityLogger() { return m_activityLogger; }
     void setActivityLogger(V8DOMActivityLogger* logger) { m_activityLogger = logger; }
 
     void addCustomElementBinding(CustomElementDefinition*, PassOwnPtr<CustomElementBinding>);
     void clearCustomElementBinding(CustomElementDefinition*);
     CustomElementBinding* customElementBinding(CustomElementDefinition*);
 
 private:
-    V8PerContextData(v8::Handle<v8::Context>, DOMWrapperWorld*);
+    V8PerContextData(v8::Handle<v8::Context>, PassRefPtr<DOMWrapperWorld>);
 
     v8::Local<v8::Object> createWrapperFromCacheSlowCase(const WrapperTypeInfo*);
     v8::Local<v8::Function> constructorForTypeSlowCase(const WrapperTypeInfo*);
 
     // For each possible type of wrapper, we keep a boilerplate object.
     // The boilerplate is used to create additional wrappers of the same type.
     typedef WTF::HashMap<const WrapperTypeInfo*, UnsafePersistent<v8::Object> > WrapperBoilerplateMap;
     WrapperBoilerplateMap m_wrapperBoilerplates;
 
     typedef WTF::HashMap<const WrapperTypeInfo*, UnsafePersistent<v8::Function> > ConstructorMap;
@@ skipping 17 matching lines @@
 
 class V8PerContextDebugData {
 public:
     static bool setContextDebugData(v8::Handle<v8::Context>, const char* worldName, int debugId);
     static int contextDebugId(v8::Handle<v8::Context>);
 };
 
 } // namespace WebCore
 
 #endif // V8PerContextData_h