mash: Migrate //ash/system/toast to WM common types

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 {
-  // "|duration_ms| == -1" means the toast view should be displayed until the
-  // dismiss button is clicked.
-  static const int32_t kInfiniteDuration = -1;
-
-  ToastData(std::string id,
-            std::string text,
-            int32_t duration_ms,
-            std::string dismiss_text);
-  ToastData(const ToastData& other);
-
-  std::string id;
-  std::string text;
-  int32_t duration_ms;
-  std::string dismiss_text;
-};
-
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_TOAST_TOAST_DATA_H_