Add WebUSB bindings and client interface

Source/modules/webusb/USBInTransferResult.h

Index: Source/modules/webusb/USBInTransferResult.h
diff --git a/Source/modules/webusb/USBInTransferResult.h b/Source/modules/webusb/USBInTransferResult.h
new file mode 100644
index 0000000000000000000000000000000000000000..edc0c682ec5cbfcf2988ad47eb9f92d54db86353
--- /dev/null
+++ b/Source/modules/webusb/USBInTransferResult.h
@@ -0,0 +1,43 @@
+// Copyright 2015 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 USBInTransferResult_h
+#define USBInTransferResult_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "platform/heap/Heap.h"
+
+namespace blink {
+
+class DOMArrayBuffer;
+
+class USBInTransferResult
+    : public GarbageCollected<USBInTransferResult>
+    , public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    static USBInTransferResult* create(const String& status, PassRefPtr<DOMArrayBuffer> data)
+    {
+        return new USBInTransferResult(status, data);
+    }
+
+    USBInTransferResult(const String& status, PassRefPtr<DOMArrayBuffer> data)
+        : m_status(status)
+        , m_data(data)
+    {
+    }
+
+    String status() const { return m_status; }
+    DOMArrayBuffer* data() const { return m_data.get(); }
+
+    DEFINE_INLINE_TRACE() { }
+
+private:
+    String m_status;
+    RefPtr<DOMArrayBuffer> m_data;
+};
+
+} // namespace blink
+
+#endif // USBInTransferResult_h