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diff --git a/Source/JavaScriptCore/heap/GCIncomingRefCountedSetInlines.h b/Source/JavaScriptCore/heap/GCIncomingRefCountedSetInlines.h
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+++ b/Source/JavaScriptCore/heap/GCIncomingRefCountedSetInlines.h
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+/*
+ * Copyright (C) 2013 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 GCIncomingRefCountedSetInlines_h
+#define GCIncomingRefCountedSetInlines_h
+
+#include "GCIncomingRefCountedSet.h"
+#include "VM.h"
+
+namespace JSC {
+
+template<typename T>
+GCIncomingRefCountedSet<T>::GCIncomingRefCountedSet()
+    : m_bytes(0)
+{
+}
+
+template<typename T>
+GCIncomingRefCountedSet<T>::~GCIncomingRefCountedSet()
+{
+    for (size_t i = m_vector.size(); i--;)
+        m_vector[i]->filterIncomingReferences(removeAll);
+}
+
+template<typename T>
+bool GCIncomingRefCountedSet<T>::addReference(JSCell* cell, T* object)
+{
+    if (!object->addIncomingReference(cell)) {
+        ASSERT(object->isDeferred());
+        ASSERT(object->numberOfIncomingReferences());
+        return false;
+    }
+    m_vector.append(object);
+    m_bytes += object->gcSizeEstimateInBytes();
+    ASSERT(object->isDeferred());
+    ASSERT(object->numberOfIncomingReferences());
+    return true;
+}
+
+template<typename T>
+void GCIncomingRefCountedSet<T>::sweep()
+{
+    for (size_t i = 0; i < m_vector.size(); ++i) {
+        T* object = m_vector[i];
+        size_t size = object->gcSizeEstimateInBytes();
+        ASSERT(object->isDeferred());
+        ASSERT(object->numberOfIncomingReferences());
+        if (!object->filterIncomingReferences(removeDead))
+            continue;
+        m_bytes -= size;
+        m_vector[i--] = m_vector.last();
+        m_vector.removeLast();
+    }
+}
+
+template<typename T>
+bool GCIncomingRefCountedSet<T>::removeAll(JSCell*)
+{
+    return false;
+}
+
+template<typename T>
+bool GCIncomingRefCountedSet<T>::removeDead(JSCell* cell)
+{
+    return Heap::isMarked(cell);
+}
+
+} // namespace JSC
+
+#endif // GCIncomingRefCountedSetInlines_h