views: Add an Options enum to MessageBoxView control.

ui/base/javascript_message_type.h

Index: ui/base/javascript_message_type.h
diff --git a/ui/base/javascript_message_type.h b/ui/base/javascript_message_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..03e1a83e4f53611c7c682d2134bb93967598d75f
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+++ b/ui/base/javascript_message_type.h
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+// Copyright (c) 2011 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 UI_BASE_JAVASCRIPT_MESSAGE_TYPE_H_
+#define UI_BASE_JAVASCRIPT_MESSAGE_TYPE_H_
+#pragma once
+
+#include "ui/base/ui_export.h"
+
+namespace ui {
+
+enum UI_EXPORT JavascriptMessageType {
+  JAVASCRIPT_MESSAGE_TYPE_ALERT,
+  JAVASCRIPT_MESSAGE_TYPE_CONFIRM,
+  JAVASCRIPT_MESSAGE_TYPE_PROMPT
+};
+
+}  // namespace ui
+
+#endif  // UI_BASE_JAVASCRIPT_MESSAGE_TYPE_H_