Fix srcset on Chrome http over TLS

gistfile1.js

if ('https:' == self.location.protocol && /chrome/i.test(window.navigator.userAgent)) {
	var srcset_elements = document.querySelectorAll('[srcset]');
	if (!!window.devicePixelRatio && window.devicePixelRatio != 1) {
		Array.prototype.forEach.call(srcset_elements, function (el) {
			var prop = el.getAttribute('srcset');
			var src_list = prop.split(/,\s*/);
			var ratio = 0;
			var src = '';
			
			src_list.forEach(function(item) {
				var tmp = /^(.*?)\s*(\d*\.?\d+)x$/.exec(item);
				if (
					!!tmp && 3 == tmp.length &&
					+tmp[2] <= window.devicePixelRatio && ratio <= +tmp[2]
				) {
					src = tmp[1];
				}
			});
			
			if (src) {
				el.setAttribute('src', src);
			}
		});
	}
	
	Array.prototype.forEach.call(srcset_elements, function (el) {
		el.removeAttribute('srcset');
	});
}