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diff --git a/Source/WebCore/dom/ScriptRunner.h b/Source/WebCore/dom/ScriptRunner.h
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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:
+ * 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 ScriptRunner_h
+#define ScriptRunner_h
+
+#include "CachedResourceHandle.h"
+#include "Timer.h"
+#include <wtf/Noncopyable.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+class CachedScript;
+class Document;
+class PendingScript;
+class ScriptElement;
+
+class ScriptRunner {
+    WTF_MAKE_NONCOPYABLE(ScriptRunner); WTF_MAKE_FAST_ALLOCATED;
+public:
+    static PassOwnPtr<ScriptRunner> create(Document* document) { return new ScriptRunner(document); }
+    ~ScriptRunner();
+
+    enum ExecutionType { ASYNC_EXECUTION, IN_ORDER_EXECUTION };
+    void queueScriptForExecution(ScriptElement*, CachedResourceHandle<CachedScript>, ExecutionType);
+    bool hasPendingScripts() const { return !m_scriptsToExecuteSoon.isEmpty() || !m_scriptsToExecuteInOrder.isEmpty(); }
+    void suspend();
+    void resume();
+    void notifyInOrderScriptReady();
+
+private:
+    ScriptRunner(Document*);
+
+    void timerFired(Timer<ScriptRunner>*);
+
+    Document* m_document;
+    Vector<PendingScript> m_scriptsToExecuteInOrder;
+    Vector<PendingScript> m_scriptsToExecuteSoon; // http://www.whatwg.org/specs/web-apps/current-work/#set-of-scripts-that-will-execute-as-soon-as-possible
+    Timer<ScriptRunner> m_timer;
+};
+
+}
+
+#endif