Reviewed by Simon Fraser.

        create 3d directory and move tests dependent of 3D Rendering in this
        directory.

        https://bugs.webkit.org/show_bug.cgi?id=33081

        * animations/3d: Added.
        * animations/3d/change-transform-in-end-event.html: Copied from LayoutTests/animations/change-transform-in-end-event.html.
        * animations/3d/state-at-end-event-transform.html: Copied from LayoutTests/animations/state-at-end-event-transform.html.
        * animations/3d/transform-origin-vs-functions-expected.txt: Copied from LayoutTests/animations/transform-origin-vs-functions-expected.txt.
        * animations/3d/transform-origin-vs-functions.html: Copied from LayoutTests/animations/transform-origin-vs-functions.html.
        * animations/change-transform-in-end-event.html: Removed.
        * animations/state-at-end-event-transform.html: Removed.
        * animations/transform-origin-vs-functions-expected.txt: Removed.
        * animations/transform-origin-vs-functions.html: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@52694 268f45cc-cd09-0410-ab3c-d52691b4dbfc