What is the <list> tag?

I was looking at Chrome's page source for its beautiful saved password management in its preferences. In it, I saw the following code:

<list id="saved-passwords-list" class="settings-list" tabindex="0">
<div class="spacer" style="height: 0px; "></div>
[...]
</list>

What is the <list> element? I didn't see it in any directory of HTML tags, or after some Googling. Maybe it's a Chrome-specific tag开发者_开发问答?

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This is probably a "create your own tag" situation.

This might be helpful: Is there a way to create your own html tag in HTML5?