 t.step_func(function() {
        verifyPreloadAndRTSupport();
        setTimeout(t.step_func(function() {
            verifyLoadedAndNoDoubleDownload("resources/dummy.js?single-download-preload");
            verifyLoadedAndNoDoubleDownload("resources/dummy.css?single-download-preload");
            verifyLoadedAndNoDoubleDownload("resources/square.png?single-download-preload");
            verifyLoadedAndNoDoubleDownload("resources/square.png?background&single-download-preload");
            verifyLoadedA