Resolve Google Map v3 without API Key

ob-map.js

/*
 * Resolve Google Map v3 without API Key
 * since june 22 2016
 * Put on body and load before map render
 */
(function (window) {
	if (!window.document) {
        return;
    }

    (new MutationObserver(function (mutations) {
    	if (typeof mutations !== 'object') {
    		return;
		}
        try {
            for (var i = 0; mutations[i]; ++i) {
                if (typeof mutations[i].addedNodes === 'undefined' || typeof mutations[i].addedNodes[0] === 'undefined') {
                    continue;
                }

                var node = mutations[i].addedNodes[0];
                if (typeof node !== 'object' || typeof node.nodeName !== 'string' || typeof node.src !== 'string') {
                	continue;
				}

                // notify when script to hack is added in HTML head
                if (node.nodeName.toUpperCase() === "SCRIPT"
                    && node.src.match(/\/AuthenticationService.Authenticate?/g)
                ) {
                    var str = mutations[i].addedNodes[0].src.match(/[?&]callback=.*[&$]/g);
                    if (str) {
						str = (str[0][str[0].length - 1] === '&')
							? str[0].substring(10, str[0].length - 1)
							: str[0].substring(10);
                        var split = str.split(".");
                        window[split[0]][split[1]] = null;
                    }
                    this.disconnect();
                }
            }
        } catch (e) {
            // pass error
        }
    })).observe(window.document.head, {
        attributes: true,
        childList: true,
        characterData: true
    });
})(window);