bindings: Adds DOMArrayBuffer, etc. as thin wrappers for ArrayBuffer, etc.

Source/core/dom/DOMArrayBuffer.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DOMArrayBuffer_h
+#define DOMArrayBuffer_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "wtf/ArrayBuffer.h"
+#include "wtf/RefCounted.h"
+
+namespace blink {
+
+class DOMArrayBuffer final : public RefCounted<DOMArrayBuffer>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    static PassRefPtr<DOMArrayBuffer> create(PassRefPtr<WTF::ArrayBuffer> buffer)
+    {
+        if (!buffer)
+            return nullptr;
+        return adoptRef(new DOMArrayBuffer(buffer));
+    }
+    static PassRefPtr<DOMArrayBuffer> create(unsigned numElements, unsigned elementByteSize)
+    {
+        return adoptRef(new DOMArrayBuffer(WTF::ArrayBuffer::create(numElements, elementByteSize)));
+    }
+    static PassRefPtr<DOMArrayBuffer> create(const void* source, unsigned byteLength)
+    {
+        return adoptRef(new DOMArrayBuffer(WTF::ArrayBuffer::create(source, byteLength)));
+    }
+    static PassRefPtr<DOMArrayBuffer> create(WTF::ArrayBufferContents& contents)
+    {
+        return adoptRef(new DOMArrayBuffer(WTF::ArrayBuffer::create(contents)));
+    }
+
+    const WTF::ArrayBuffer* buffer() const { return m_buffer.get(); }
+    WTF::ArrayBuffer* buffer() { return m_buffer.get(); }
+
+    const void* data() const { return buffer()->data(); }
+    unsigned long byteLength() const { return buffer()->byteLength(); }
+    void* data() { return buffer()->data(); }
+    bool transfer(WTF::ArrayBufferContents& result) { return buffer()->transfer(result); }
+    bool isNeutered() { return buffer()->isNeutered(); }
+
+    virtual v8::Handle<v8::Object> wrap(v8::Handle<v8::Object> creationContext, v8::Isolate*) override;
+    virtual v8::Handle<v8::Object> associateWithWrapper(const WrapperTypeInfo*, v8::Handle<v8::Object> wrapper, v8::Isolate*) override;
+
+private:
+    explicit DOMArrayBuffer(PassRefPtr<WTF::ArrayBuffer> buffer)
+        : m_buffer(buffer)
+    {
+        ASSERT(m_buffer);
+    }
+
+    RefPtr<WTF::ArrayBuffer> m_buffer;
+};
+
+} // namespace blink
+
+#endif // DOMArrayBuffer_h