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diff --git a/Source/WebCore/bindings/js/ScriptCallStackFactory.cpp b/Source/WebCore/bindings/js/ScriptCallStackFactory.cpp
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+++ b/Source/WebCore/bindings/js/ScriptCallStackFactory.cpp
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+/*
+ * Copyright (c) 2010 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
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER 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.
+ */
+
+#include "config.h"
+#include "ScriptCallStackFactory.h"
+
+#include "JSDOMBinding.h"
+#include "ScriptArguments.h"
+#include "ScriptCallFrame.h"
+#include "ScriptCallStack.h"
+#include "ScriptValue.h"
+#include <interpreter/CallFrame.h>
+#include <interpreter/Interpreter.h>
+#include <runtime/ArgList.h>
+#include <runtime/JSFunction.h>
+#include <runtime/JSGlobalData.h>
+#include <runtime/JSValue.h>
+#include <runtime/UString.h>
+
+using namespace JSC;
+
+namespace WebCore {
+
+PassRefPtr<ScriptCallStack> createScriptCallStack(size_t, bool)
+{
+    return 0;
+}
+
+PassRefPtr<ScriptCallStack> createScriptCallStack(JSC::ExecState* exec, size_t maxStackSize)
+{
+    Vector<ScriptCallFrame> frames;
+    CallFrame* callFrame = exec;
+    while (true) {
+        ASSERT(callFrame);
+        int signedLineNumber;
+        intptr_t sourceID;
+        UString urlString;
+        JSValue function;
+
+        exec->interpreter()->retrieveLastCaller(callFrame, signedLineNumber, sourceID, urlString, function);
+        UString functionName;
+        if (function)
+            functionName = asFunction(function)->name(exec);
+        else {
+            // Caller is unknown, but if frames is empty we should still add the frame, because
+            // something called us, and gave us arguments.
+            if (!frames.isEmpty())
+                break;
+        }
+        unsigned lineNumber = signedLineNumber >= 0 ? signedLineNumber : 0;
+        frames.append(ScriptCallFrame(ustringToString(functionName), ustringToString(urlString), lineNumber));
+        if (!function || frames.size() == maxStackSize)
+            break;
+        callFrame = callFrame->callerFrame();
+    }
+    return ScriptCallStack::create(frames);
+}
+
+PassRefPtr<ScriptArguments> createScriptArguments(JSC::ExecState* exec, unsigned skipArgumentCount)
+{
+    Vector<ScriptValue> arguments;
+    size_t argumentCount = exec->argumentCount();
+    for (size_t i = skipArgumentCount; i < argumentCount; ++i)
+        arguments.append(ScriptValue(exec->argument(i)));
+    return ScriptArguments::create(exec, arguments);
+}
+
+} // namespace WebCore