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diff --git a/Source/JavaScriptCore/runtime/TimeoutChecker.h b/Source/JavaScriptCore/runtime/TimeoutChecker.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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE 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 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 TimeoutChecker_h
+#define TimeoutChecker_h
+
+#include <wtf/Assertions.h>
+
+#ifdef ANDROID_INSTRUMENT
+#include "TimeCounter.h"
+#endif
+
+namespace JSC {
+
+    class ExecState;
+
+    class TimeoutChecker {
+    public:
+        TimeoutChecker();
+
+        void setTimeoutInterval(unsigned timeoutInterval) { m_timeoutInterval = timeoutInterval; }
+        unsigned timeoutInterval() const { return m_timeoutInterval; }
+        
+        unsigned ticksUntilNextCheck() { return m_ticksUntilNextCheck; }
+        
+        void start()
+        {
+            if (!m_startCount)
+                reset();
+#ifdef ANDROID_INSTRUMENT
+            if (!m_startCount)
+                android::TimeCounter::start(android::TimeCounter::JavaScriptTimeCounter);
+#endif
+            ++m_startCount;
+        }
+
+        void stop()
+        {
+            ASSERT(m_startCount);
+            --m_startCount;
+#ifdef ANDROID_INSTRUMENT
+            if (!m_startCount)
+                android::TimeCounter::record(android::TimeCounter::JavaScriptTimeCounter, __FUNCTION__);
+#endif
+        }
+
+        void reset();
+
+        bool didTimeOut(ExecState*);
+
+    private:
+        unsigned m_timeoutInterval;
+        unsigned m_timeAtLastCheck;
+        unsigned m_timeExecuting;
+        unsigned m_startCount;
+        unsigned m_ticksUntilNextCheck;
+    };
+
+} // namespace JSC
+
+#endif // TimeoutChecker_h