Update WritableStream to new standard version

third_party/WebKit/LayoutTests/http/tests/streams/writable-streams/byte-length-queuing-strategy.js

-'use strict';
-
-if (self.importScripts) {
-  self.importScripts('/resources/testharness.js');
-}
-
-promise_test(() => {
-  let isDone = false;
-  const ws = new WritableStream(
-    {
-      write() {
-        return new Promise(resolve => {
-          setTimeout(() => {
-            isDone = true;
-            resolve();
-          }, 200);
-        });
-      },
-
-      close() {
-        assert_true(isDone, 'close is only called once the promise has been resolved');
-      }
-    },
-    new ByteLengthQueuingStrategy({ highWaterMark: 1024 * 16 })
-  );
-
-  const writer = ws.getWriter();
-  writer.write({ byteLength: 1024 });
-
-  return writer.close();
-}, 'Closing a writable stream with in-flight writes below the high water mark delays the close call properly');
-
-done();