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diff --git a/WebCore/bindings/js/JavaScriptCallFrame.h b/WebCore/bindings/js/JavaScriptCallFrame.h
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+++ b/WebCore/bindings/js/JavaScriptCallFrame.h
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+/*
+ * Copyright (C) 2008 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
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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
+ * 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 JavaScriptCallFrame_h
+#define JavaScriptCallFrame_h
+
+#if ENABLE(JAVASCRIPT_DEBUGGER) && USE(JSC)
+
+#include <debugger/DebuggerCallFrame.h>
+#include <interpreter/CallFrame.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+
+namespace WebCore {
+
+class String;
+
+class JavaScriptCallFrame : public RefCounted<JavaScriptCallFrame> {
+public:
+    static PassRefPtr<JavaScriptCallFrame> create(const JSC::DebuggerCallFrame& debuggerCallFrame, PassRefPtr<JavaScriptCallFrame> caller, intptr_t sourceID, int line)
+    {
+        return adoptRef(new JavaScriptCallFrame(debuggerCallFrame, caller, sourceID, line));
+    }
+
+    void invalidate()
+    {
+        m_isValid = false;
+        m_debuggerCallFrame = 0;
+    }
+
+    bool isValid() const { return m_isValid; }
+
+    JavaScriptCallFrame* caller();
+
+    intptr_t sourceID() const { return m_sourceID; }
+    int line() const { return m_line; }
+    void update(const JSC::DebuggerCallFrame& debuggerCallFrame, intptr_t sourceID, int line)
+    {
+        m_debuggerCallFrame = debuggerCallFrame;
+        m_line = line;
+        m_sourceID = sourceID;
+        m_isValid = true;
+    }
+
+    String functionName() const;
+    JSC::DebuggerCallFrame::Type type() const;
+    const JSC::ScopeChainNode* scopeChain() const;
+    JSC::JSGlobalObject* dynamicGlobalObject() const;
+
+    JSC::JSObject* thisObject() const;
+    JSC::JSValue evaluate(const JSC::UString& script, JSC::JSValue& exception) const;
+    
+private:
+    JavaScriptCallFrame(const JSC::DebuggerCallFrame&, PassRefPtr<JavaScriptCallFrame> caller, intptr_t sourceID, int line);
+
+    JSC::DebuggerCallFrame m_debuggerCallFrame;
+    RefPtr<JavaScriptCallFrame> m_caller;
+    intptr_t m_sourceID;
+    int m_line;
+    bool m_isValid;
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(JAVASCRIPT_DEBUGGER)
+
+#endif // JavaScriptCallFrame_h