Import //fetch from Web Platform Tests.

third_party/WebKit/LayoutTests/external/wpt/fetch/api/basic/request-head.js

+if (this.document === undefined) {
+  importScripts("/resources/testharness.js");
+}
+
+promise_test(function(test) {
+  var requestInit = {"method": "HEAD", "body": "test"};
+  return promise_rejects(test, new TypeError(), fetch(".", requestInit));
+}, "Fetch with HEAD with body");
+
+done();