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diff --git a/Source/JavaScriptCore/dfg/DFGDesiredWatchpoints.cpp b/Source/JavaScriptCore/dfg/DFGDesiredWatchpoints.cpp
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+++ b/Source/JavaScriptCore/dfg/DFGDesiredWatchpoints.cpp
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+/*
+ * Copyright (C) 2013-2015 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. 
+ */
+
+#include "config.h"
+#include "DFGDesiredWatchpoints.h"
+
+#if ENABLE(DFG_JIT)
+
+#include "ArrayBufferNeuteringWatchpoint.h"
+#include "CodeBlock.h"
+#include "JSCInlines.h"
+
+namespace JSC { namespace DFG {
+
+void ArrayBufferViewWatchpointAdaptor::add(
+    CodeBlock* codeBlock, JSArrayBufferView* view, CommonData& common)
+{
+    Watchpoint* watchpoint = common.watchpoints.add(codeBlock);
+    ArrayBufferNeuteringWatchpoint* neuteringWatchpoint =
+        ArrayBufferNeuteringWatchpoint::create(*codeBlock->vm());
+    neuteringWatchpoint->set()->add(watchpoint);
+    codeBlock->addConstant(neuteringWatchpoint);
+    codeBlock->vm()->heap.addReference(neuteringWatchpoint, view->buffer());
+}
+
+void InferredValueAdaptor::add(
+    CodeBlock* codeBlock, InferredValue* inferredValue, CommonData& common)
+{
+    codeBlock->addConstant(inferredValue); // For common users, it doesn't really matter if it's weak or not. If references to it go away, we go away, too.
+    inferredValue->add(common.watchpoints.add(codeBlock));
+}
+
+void AdaptiveStructureWatchpointAdaptor::add(
+    CodeBlock* codeBlock, const ObjectPropertyCondition& key, CommonData& common)
+{
+    switch (key.kind()) {
+    case PropertyCondition::Equivalence:
+        common.adaptiveInferredPropertyValueWatchpoints.add(key, codeBlock)->install();
+        break;
+    default:
+        common.adaptiveStructureWatchpoints.add(key, codeBlock)->install();
+        break;
+    }
+}
+
+void InferredTypeAdaptor::add(CodeBlock* codeBlock, const DesiredInferredType& key, CommonData& common)
+{
+    key.add(common.watchpoints.add(codeBlock));
+}
+
+DesiredWatchpoints::DesiredWatchpoints() { }
+DesiredWatchpoints::~DesiredWatchpoints() { }
+
+void DesiredWatchpoints::addLazily(WatchpointSet* set)
+{
+    m_sets.addLazily(set);
+}
+
+void DesiredWatchpoints::addLazily(InlineWatchpointSet& set)
+{
+    m_inlineSets.addLazily(&set);
+}
+
+void DesiredWatchpoints::addLazily(InferredValue* inferredValue)
+{
+    m_inferredValues.addLazily(inferredValue);
+}
+
+void DesiredWatchpoints::addLazily(JSArrayBufferView* view)
+{
+    m_bufferViews.addLazily(view);
+}
+
+void DesiredWatchpoints::addLazily(const ObjectPropertyCondition& key)
+{
+    m_adaptiveStructureSets.addLazily(key);
+}
+
+void DesiredWatchpoints::addLazily(const DesiredInferredType& key)
+{
+    m_inferredTypes.addLazily(key);
+}
+
+bool DesiredWatchpoints::consider(Structure* structure)
+{
+    if (!structure->dfgShouldWatch())
+        return false;
+    addLazily(structure->transitionWatchpointSet());
+    return true;
+}
+
+void DesiredWatchpoints::reallyAdd(CodeBlock* codeBlock, CommonData& commonData)
+{
+    m_sets.reallyAdd(codeBlock, commonData);
+    m_inlineSets.reallyAdd(codeBlock, commonData);
+    m_inferredValues.reallyAdd(codeBlock, commonData);
+    m_bufferViews.reallyAdd(codeBlock, commonData);
+    m_adaptiveStructureSets.reallyAdd(codeBlock, commonData);
+    m_inferredTypes.reallyAdd(codeBlock, commonData);
+}
+
+bool DesiredWatchpoints::areStillValid() const
+{
+    return m_sets.areStillValid()
+        && m_inlineSets.areStillValid()
+        && m_inferredValues.areStillValid()
+        && m_bufferViews.areStillValid()
+        && m_adaptiveStructureSets.areStillValid()
+        && m_inferredTypes.areStillValid();
+}
+
+void DesiredWatchpoints::dumpInContext(PrintStream& out, DumpContext* context) const
+{
+    out.print("Desired watchpoints:\n");
+    out.print("    Watchpoint sets: ", inContext(m_sets, context), "\n");
+    out.print("    Inline watchpoint sets: ", inContext(m_inlineSets, context), "\n");
+    out.print("    Inferred values: ", inContext(m_inferredValues, context), "\n");
+    out.print("    Buffer views: ", inContext(m_bufferViews, context), "\n");
+    out.print("    Object property conditions: ", inContext(m_adaptiveStructureSets, context), "\n");
+    out.print("    Inferred types: ", inContext(m_inferredTypes, context), "\n");
+}
+
+} } // namespace JSC::DFG
+
+#endif // ENABLE(DFG_JIT)
+