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diff --git a/device/hid/hid_collection_info.h b/device/hid/hid_collection_info.h
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+++ b/device/hid/hid_collection_info.h
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+// 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 DEVICE_HID_HID_COLLECTION_INFO_H_
+#define DEVICE_HID_HID_COLLECTION_INFO_H_
+
+#include <set>
+
+#include "device/hid/hid_usage_and_page.h"
+
+namespace device {
+
+struct HidCollectionInfo {
+  HidCollectionInfo();
+  ~HidCollectionInfo();
+
+  // Collection's usage ID.
+  HidUsageAndPage usage;
+
+  // HID report IDs which belong
+  // to this collection or to its
+  // embedded collections.
+  std::set<int> report_ids;
+};
+
+}  // namespace device"
+
+#endif  // DEVICE_HID_HID_COLLECTION_INFO_H_