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diff --git a/Source/WebCore/bindings/v8/V8PerIsolateData.h b/Source/WebCore/bindings/v8/V8PerIsolateData.h
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+++ b/Source/WebCore/bindings/v8/V8PerIsolateData.h
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+/*
+ * Copyright (C) 2009 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:
+ * 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
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef V8PerIsolateData_h
+#define V8PerIsolateData_h
+
+#include <v8.h>
+#include <wtf/HashMap.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+class DOMDataStore;
+class GCEventData;
+class IntegerCache;
+class MemoryObjectInfo;
+class StringCache;
+class V8HiddenPropertyName;
+struct WrapperTypeInfo;
+
+#if ENABLE(INSPECTOR)
+class ExternalStringVisitor;
+#endif
+
+typedef WTF::Vector<DOMDataStore*> DOMDataList;
+
+#ifndef NDEBUG
+class GlobalHandleInfo;
+typedef HashMap<v8::Value*, GlobalHandleInfo*> GlobalHandleMap;
+#endif
+
+class V8PerIsolateData {
+public:
+    static V8PerIsolateData* create(v8::Isolate*);
+    static void ensureInitialized(v8::Isolate*);
+    static V8PerIsolateData* current(v8::Isolate* isolate = 0)
+    {
+        if (UNLIKELY(!isolate))
+            isolate = v8::Isolate::GetCurrent();
+        ASSERT(isolate->GetData());
+        return static_cast<V8PerIsolateData*>(isolate->GetData()); 
+    }
+    static void dispose(v8::Isolate*);
+
+    typedef HashMap<WrapperTypeInfo*, v8::Persistent<v8::FunctionTemplate> > TemplateMap;
+
+    TemplateMap& rawTemplateMap() { return m_rawTemplates; }
+    TemplateMap& templateMap() { return m_templates; }
+    v8::Persistent<v8::String>& toStringName() { return m_toStringName; }
+    v8::Persistent<v8::FunctionTemplate>& toStringTemplate() { return m_toStringTemplate; }
+
+    v8::Persistent<v8::FunctionTemplate>& lazyEventListenerToStringTemplate()
+    {
+        return m_lazyEventListenerToStringTemplate;
+    }
+
+    StringCache* stringCache() { return m_stringCache.get(); }
+    IntegerCache* integerCache() { return m_integerCache.get(); }
+
+#if ENABLE(INSPECTOR)
+    void visitExternalStrings(ExternalStringVisitor*);
+#endif
+    DOMDataList& allStores() { return m_domDataList; }
+
+    V8HiddenPropertyName* hiddenPropertyName() { return m_hiddenPropertyName.get(); }
+    v8::Persistent<v8::Context>& auxiliaryContext() { return m_auxiliaryContext; }
+
+    void registerDOMDataStore(DOMDataStore* domDataStore) 
+    {
+        m_domDataList.append(domDataStore);
+    }
+
+    void unregisterDOMDataStore(DOMDataStore* domDataStore)
+    {
+        ASSERT(m_domDataList.find(domDataStore));
+        m_domDataList.remove(m_domDataList.find(domDataStore));
+    }
+
+    // DOMDataStore is owned outside V8PerIsolateData.
+    DOMDataStore* domDataStore() { return m_domDataStore; }
+    void setDOMDataStore(DOMDataStore* store) { m_domDataStore = store; }
+
+    int recursionLevel() const { return m_recursionLevel; }
+    int incrementRecursionLevel() { return ++m_recursionLevel; }
+    int decrementRecursionLevel() { return --m_recursionLevel; }
+
+#ifndef NDEBUG
+    GlobalHandleMap& globalHandleMap() { return m_globalHandleMap; }
+
+    int internalScriptRecursionLevel() const { return m_internalScriptRecursionLevel; }
+    int incrementInternalScriptRecursionLevel() { return ++m_internalScriptRecursionLevel; }
+    int decrementInternalScriptRecursionLevel() { return --m_internalScriptRecursionLevel; }
+#endif
+
+    GCEventData* gcEventData() { return m_gcEventData.get(); }
+
+    void reportMemoryUsage(MemoryObjectInfo*) const;
+
+    // Gives the system a hint that we should request garbage collection
+    // upon the next close or navigation event, because some expensive
+    // objects have been allocated that we want to take every opportunity
+    // to collect.
+    void setShouldCollectGarbageSoon() { m_shouldCollectGarbageSoon = true; }
+    void clearShouldCollectGarbageSoon() { m_shouldCollectGarbageSoon = false; }
+    bool shouldCollectGarbageSoon() const { return m_shouldCollectGarbageSoon; }
+
+private:
+    explicit V8PerIsolateData(v8::Isolate*);
+    ~V8PerIsolateData();
+
+    TemplateMap m_rawTemplates;
+    TemplateMap m_templates;
+    v8::Persistent<v8::String> m_toStringName;
+    v8::Persistent<v8::FunctionTemplate> m_toStringTemplate;
+    v8::Persistent<v8::FunctionTemplate> m_lazyEventListenerToStringTemplate;
+    OwnPtr<StringCache> m_stringCache;
+    OwnPtr<IntegerCache> m_integerCache;
+
+    DOMDataList m_domDataList;
+    DOMDataStore* m_domDataStore;
+
+    OwnPtr<V8HiddenPropertyName> m_hiddenPropertyName;
+    v8::Persistent<v8::Context> m_auxiliaryContext;
+
+    bool m_constructorMode;
+    friend class ConstructorMode;
+
+    int m_recursionLevel;
+
+#ifndef NDEBUG
+    GlobalHandleMap m_globalHandleMap;
+    int m_internalScriptRecursionLevel;
+#endif
+    OwnPtr<GCEventData> m_gcEventData;
+    bool m_shouldCollectGarbageSoon;
+};
+
+} // namespace WebCore
+
+#endif // V8PerIsolateData_h