function getRemoteFunctionsScript() {
        var script = "";
        // Inject DocumentObserver into the browser (tracks related documents)
        script += DocumentObserver;
        // Inject remote functions into the browser.
        script += "window._LD=(" + RemoteFunctions + "(" + JSON.stringify(LiveDevMultiBrowser.config) + "))";
        return "<script>\n" + script + "</script>\n";
    }
Returns a script that should be injected into the HTML that's launched in the
browser in order to implement remote commands that handle protocol requests.
Includes the <script> tags.
@return {string}