Support cancelling toast

ash/system/toast/toast_data.h

+// 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 ASH_SYSTEM_TOAST_TOAST_DATA_H_
+#define ASH_SYSTEM_TOAST_TOAST_DATA_H_
+
+#include <string>
+
+#include "ash/ash_export.h"
+
+namespace ash {
+
+struct ASH_EXPORT ToastData {
+  ToastData(const std::string& id,
+            const std::string& text,
+            uint64_t duration_ms)
+      : id(id), text(text), duration_ms(duration_ms) {}
+
+  std::string id;
+  std::string text;
+  uint64_t duration_ms;
+};
+
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_TOAST_TOAST_DATA_H_