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diff --git a/Source/JavaScriptCore/heap/SlotVisitorInlineMethods.h b/Source/JavaScriptCore/heap/SlotVisitorInlineMethods.h
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+++ b/Source/JavaScriptCore/heap/SlotVisitorInlineMethods.h
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+/*
+ * Copyright (C) 2012 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. 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 INC. 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 SlotVisitorInlineMethods_h
+#define SlotVisitorInlineMethods_h
+
+#include "CopiedSpaceInlineMethods.h"
+#include "Options.h"
+#include "SlotVisitor.h"
+
+namespace JSC {
+
+ALWAYS_INLINE void SlotVisitor::append(JSValue* slot, size_t count)
+{
+    for (size_t i = 0; i < count; ++i) {
+        JSValue& value = slot[i];
+        internalAppend(value);
+    }
+}
+
+template<typename T>
+inline void SlotVisitor::appendUnbarrieredPointer(T** slot)
+{
+    ASSERT(slot);
+    JSCell* cell = *slot;
+    internalAppend(cell);
+}
+
+ALWAYS_INLINE void SlotVisitor::append(JSValue* slot)
+{
+    ASSERT(slot);
+    internalAppend(*slot);
+}
+
+ALWAYS_INLINE void SlotVisitor::appendUnbarrieredValue(JSValue* slot)
+{
+    ASSERT(slot);
+    internalAppend(*slot);
+}
+
+ALWAYS_INLINE void SlotVisitor::append(JSCell** slot)
+{
+    ASSERT(slot);
+    internalAppend(*slot);
+}
+
+ALWAYS_INLINE void SlotVisitor::internalAppend(JSValue value)
+{
+    if (!value || !value.isCell())
+        return;
+    internalAppend(value.asCell());
+}
+
+inline void SlotVisitor::addWeakReferenceHarvester(WeakReferenceHarvester* weakReferenceHarvester)
+{
+    m_shared.m_weakReferenceHarvesters.addThreadSafe(weakReferenceHarvester);
+}
+
+inline void SlotVisitor::addUnconditionalFinalizer(UnconditionalFinalizer* unconditionalFinalizer)
+{
+    m_shared.m_unconditionalFinalizers.addThreadSafe(unconditionalFinalizer);
+}
+
+inline void SlotVisitor::addOpaqueRoot(void* root)
+{
+#if ENABLE(PARALLEL_GC)
+    if (Options::numberOfGCMarkers() == 1) {
+        // Put directly into the shared HashSet.
+        m_shared.m_opaqueRoots.add(root);
+        return;
+    }
+    // Put into the local set, but merge with the shared one every once in
+    // a while to make sure that the local sets don't grow too large.
+    mergeOpaqueRootsIfProfitable();
+    m_opaqueRoots.add(root);
+#else
+    m_opaqueRoots.add(root);
+#endif
+}
+
+inline bool SlotVisitor::containsOpaqueRoot(void* root)
+{
+    ASSERT(!m_isInParallelMode);
+#if ENABLE(PARALLEL_GC)
+    ASSERT(m_opaqueRoots.isEmpty());
+    return m_shared.m_opaqueRoots.contains(root);
+#else
+    return m_opaqueRoots.contains(root);
+#endif
+}
+
+inline int SlotVisitor::opaqueRootCount()
+{
+    ASSERT(!m_isInParallelMode);
+#if ENABLE(PARALLEL_GC)
+    ASSERT(m_opaqueRoots.isEmpty());
+    return m_shared.m_opaqueRoots.size();
+#else
+    return m_opaqueRoots.size();
+#endif
+}
+
+inline void SlotVisitor::mergeOpaqueRootsIfNecessary()
+{
+    if (m_opaqueRoots.isEmpty())
+        return;
+    mergeOpaqueRoots();
+}
+    
+inline void SlotVisitor::mergeOpaqueRootsIfProfitable()
+{
+    if (static_cast<unsigned>(m_opaqueRoots.size()) < Options::opaqueRootMergeThreshold())
+        return;
+    mergeOpaqueRoots();
+}
+    
+inline void SlotVisitor::donate()
+{
+    ASSERT(m_isInParallelMode);
+    if (Options::numberOfGCMarkers() == 1)
+        return;
+    
+    donateKnownParallel();
+}
+
+inline void SlotVisitor::donateAndDrain()
+{
+    donate();
+    drain();
+}
+
+inline void SlotVisitor::copyLater(void* ptr, size_t bytes)
+{
+    if (CopiedSpace::isOversize(bytes)) {
+        m_shared.m_copiedSpace->pin(CopiedSpace::oversizeBlockFor(ptr));
+        return;
+    }
+
+    CopiedBlock* block = CopiedSpace::blockFor(ptr);
+    if (block->isPinned())
+        return;
+
+    block->reportLiveBytes(bytes);
+
+    if (!block->shouldEvacuate())
+        m_shared.m_copiedSpace->pin(block);
+}
+    
+} // namespace JSC
+
+#endif // SlotVisitorInlineMethods_h
+