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diff --git a/Source/WebCore/bindings/js/JSDOMConvertBufferSource.h b/Source/WebCore/bindings/js/JSDOMConvertBufferSource.h
new file mode 100644
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+++ b/Source/WebCore/bindings/js/JSDOMConvertBufferSource.h
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+/*
+ * Copyright (C) 2016 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.
+ */
+
+#pragma once
+
+#include "BufferSource.h"
+#include "JSDOMConvertInterface.h"
+#include "JSDOMWrapperCache.h"
+#include "JSDynamicDowncast.h"
+#include <runtime/JSTypedArrays.h>
+
+namespace WebCore {
+
+// FIXME: It is wrong that we treat buffer related types as interfaces, they should be their own IDL type. 
+
+// Add adaptors to make ArrayBuffer / ArrayBufferView / typed arrays act like normal interfaces.
+
+template<typename ImplementationClass> struct JSDOMWrapperConverterTraits;
+
+template<> struct JSDOMWrapperConverterTraits<JSC::ArrayBuffer> {
+    using WrapperClass = JSC::JSArrayBuffer;
+    using ToWrappedReturnType = JSC::ArrayBuffer*;
+};
+
+template<> struct JSDOMWrapperConverterTraits<JSC::ArrayBufferView> {
+    using WrapperClass = JSC::JSArrayBufferView;
+    using ToWrappedReturnType = RefPtr<ArrayBufferView>;
+};
+
+template<typename Adaptor> struct JSDOMWrapperConverterTraits<JSC::GenericTypedArrayView<Adaptor>> {
+    using WrapperClass = JSC::JSGenericTypedArrayView<Adaptor>;
+    using ToWrappedReturnType = RefPtr<JSC::GenericTypedArrayView<Adaptor>>;
+};
+
+
+inline RefPtr<JSC::Int8Array> toPossiblySharedInt8Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toPossiblySharedNativeTypedView<JSC::Int8Adaptor>(vm, value); }
+inline RefPtr<JSC::Int16Array> toPossiblySharedInt16Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toPossiblySharedNativeTypedView<JSC::Int16Adaptor>(vm, value); }
+inline RefPtr<JSC::Int32Array> toPossiblySharedInt32Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toPossiblySharedNativeTypedView<JSC::Int32Adaptor>(vm, value); }
+inline RefPtr<JSC::Uint8Array> toPossiblySharedUint8Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toPossiblySharedNativeTypedView<JSC::Uint8Adaptor>(vm, value); }
+inline RefPtr<JSC::Uint8ClampedArray> toPossiblySharedUint8ClampedArray(JSC::VM& vm, JSC::JSValue value) { return JSC::toPossiblySharedNativeTypedView<JSC::Uint8ClampedAdaptor>(vm, value); }
+inline RefPtr<JSC::Uint16Array> toPossiblySharedUint16Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toPossiblySharedNativeTypedView<JSC::Uint16Adaptor>(vm, value); }
+inline RefPtr<JSC::Uint32Array> toPossiblySharedUint32Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toPossiblySharedNativeTypedView<JSC::Uint32Adaptor>(vm, value); }
+inline RefPtr<JSC::Float32Array> toPossiblySharedFloat32Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toPossiblySharedNativeTypedView<JSC::Float32Adaptor>(vm, value); }
+inline RefPtr<JSC::Float64Array> toPossiblySharedFloat64Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toPossiblySharedNativeTypedView<JSC::Float64Adaptor>(vm, value); }
+
+inline RefPtr<JSC::Int8Array> toUnsharedInt8Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toUnsharedNativeTypedView<JSC::Int8Adaptor>(vm, value); }
+inline RefPtr<JSC::Int16Array> toUnsharedInt16Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toUnsharedNativeTypedView<JSC::Int16Adaptor>(vm, value); }
+inline RefPtr<JSC::Int32Array> toUnsharedInt32Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toUnsharedNativeTypedView<JSC::Int32Adaptor>(vm, value); }
+inline RefPtr<JSC::Uint8Array> toUnsharedUint8Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toUnsharedNativeTypedView<JSC::Uint8Adaptor>(vm, value); }
+inline RefPtr<JSC::Uint8ClampedArray> toUnsharedUint8ClampedArray(JSC::VM& vm, JSC::JSValue value) { return JSC::toUnsharedNativeTypedView<JSC::Uint8ClampedAdaptor>(vm, value); }
+inline RefPtr<JSC::Uint16Array> toUnsharedUint16Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toUnsharedNativeTypedView<JSC::Uint16Adaptor>(vm, value); }
+inline RefPtr<JSC::Uint32Array> toUnsharedUint32Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toUnsharedNativeTypedView<JSC::Uint32Adaptor>(vm, value); }
+inline RefPtr<JSC::Float32Array> toUnsharedFloat32Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toUnsharedNativeTypedView<JSC::Float32Adaptor>(vm, value); }
+inline RefPtr<JSC::Float64Array> toUnsharedFloat64Array(JSC::VM& vm, JSC::JSValue value) { return JSC::toUnsharedNativeTypedView<JSC::Float64Adaptor>(vm, value); }
+
+inline JSC::JSValue toJS(JSC::ExecState* state, JSDOMGlobalObject* globalObject, JSC::ArrayBuffer& buffer)
+{
+    if (auto result = getCachedWrapper(globalObject->world(), buffer))
+        return result;
+
+    // The JSArrayBuffer::create function will register the wrapper in finishCreation.
+    return JSC::JSArrayBuffer::create(state->vm(), globalObject->arrayBufferStructure(buffer.sharingMode()), &buffer);
+}
+
+inline JSC::JSValue toJS(JSC::ExecState* state, JSC::JSGlobalObject* globalObject, JSC::ArrayBufferView& view)
+{
+    return view.wrap(state, globalObject);
+}
+
+inline JSC::JSValue toJS(JSC::ExecState* state, JSDOMGlobalObject* globalObject, JSC::ArrayBuffer* buffer)
+{
+    if (!buffer)
+        return JSC::jsNull();
+    return toJS(state, globalObject, *buffer);
+}
+
+inline JSC::JSValue toJS(JSC::ExecState* state, JSC::JSGlobalObject* globalObject, JSC::ArrayBufferView* view)
+{
+    if (!view)
+        return JSC::jsNull();
+    return toJS(state, globalObject, *view);
+}
+
+inline RefPtr<JSC::ArrayBufferView> toPossiblySharedArrayBufferView(JSC::VM& vm, JSC::JSValue value)
+{
+    auto* wrapper = jsDynamicDowncast<JSC::JSArrayBufferView*>(vm, value);
+    if (!wrapper)
+        return nullptr;
+    return wrapper->possiblySharedImpl();
+}
+
+inline RefPtr<JSC::ArrayBufferView> toUnsharedArrayBufferView(JSC::VM& vm, JSC::JSValue value)
+{
+    auto result = toPossiblySharedArrayBufferView(vm, value);
+    if (!result || result->isShared())
+        return nullptr;
+    return result;
+}
+
+} // namespace WebCore