Edit: ultrafez pointed out on Reddit that it's just Android 4.0 that syncs your bookmarks with Google Chrome and I guess he's right.

There have been rumors that a mobile version of the popular web browser Google Chrome could be released soon.

A new folder "Mobile Bookmarks" has been spotted in the latest Chromium version.

Chrome-mobile

Also, you can't delete it, since it is a default folder.
Chrome-mobile2

 

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