"Welcome Google Chat" Banner Remover - User JS for Greasemonkey / Tampermonkey.

remove-google-chat-welcome-banner.user.js

// ==UserScript==
// @name         Welcome Google Chat Remover
// @version      0.1
// @description  Removes Google Chat's Welcome banner that is annoying.
// @author       Gustavo Moraes ([email protected])
// @match        https://mail.google.com/*
// @icon         data:image/png;base64,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
// @require      http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// @require      https://gist.github.com/raw/2625891/waitForKeyElements.js
// @grant        GM_addStyle
// ==/UserScript==

(function() {
    'use strict';

    function removeWelcomeBanner (jNode) {
        $(".aB7")[0].remove();
        $(".bgt").css("margin-bottom", "auto");
    }

    waitForKeyElements (".aB7", removeWelcomeBanner);
})();

Welcome-Google-Chat-Remover-icon.svg