WebUSB bindings part 3

Source/modules/webusb/USBDevice.cpp

+// 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.
+
+#include "config.h"
+#include "modules/webusb/USBDevice.h"
+
+#include "modules/webusb/USBConfiguration.h"
+
+namespace blink {
+
+HeapVector<Member<USBConfiguration>> USBDevice::configurations() const
+{
+    HeapVector<Member<USBConfiguration>> configurations;
+    for (size_t i = 0; i < info().configurations.size(); ++i)
+        configurations.append(USBConfiguration::create(this, i));
+    return configurations;
+}
+
+} // namespace blink