Reviewed by Pavel Feldman.

        Web Inspector: better Function.prototype.bind for the internal code.

        In the "Event Listeners" pane show handler function instead of Function.prototype.bind.

        https://bugs.webkit.org/show_bug.cgi?id=40080

        * inspector/front-end/utilities.js:
        (Function.prototype.bind.bound):
        (Function.prototype.bind.bound.toString):
        (Function.prototype.bind):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@60682 268f45cc-cd09-0410-ab3c-d52691b4dbfc