Add support for isochronous transfers in WebUSB.

third_party/WebKit/Source/modules/webusb/USBIsochronousOutTransferPacket.h

Index: third_party/WebKit/Source/modules/webusb/USBIsochronousOutTransferPacket.h
diff --git a/third_party/WebKit/Source/modules/webusb/USBIsochronousOutTransferPacket.h b/third_party/WebKit/Source/modules/webusb/USBIsochronousOutTransferPacket.h
new file mode 100644
index 0000000000000000000000000000000000000000..240423d6b586f2af61b69c2b967e2ec6631b405c
--- /dev/null
+++ b/third_party/WebKit/Source/modules/webusb/USBIsochronousOutTransferPacket.h
@@ -0,0 +1,42 @@
+// Copyright 2016 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 USBIsochronousOutTransferPacket_h
+#define USBIsochronousOutTransferPacket_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "platform/heap/GarbageCollected.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class USBIsochronousOutTransferPacket final : public GarbageCollectedFinalized<USBIsochronousOutTransferPacket>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    static USBIsochronousOutTransferPacket* create(const String& status, unsigned bytesWritten)
+    {
+        return new USBIsochronousOutTransferPacket(status, bytesWritten);
+    }
+
+    USBIsochronousOutTransferPacket(const String& status, unsigned bytesWritten)
+        : m_status(status)
+        , m_bytesWritten(bytesWritten)
+    {
+    }
+
+    virtual ~USBIsochronousOutTransferPacket() {}
+
+    String status() const { return m_status; }
+    unsigned bytesWritten() const { return m_bytesWritten; }
+
+    DEFINE_INLINE_TRACE() {}
+
+private:
+    const String m_status;
+    const unsigned m_bytesWritten;
+};
+
+} // namespace blink
+
+#endif // USBIsochronousOutTransferPacket_h