fetch: make consumeBody sync

Author: Uzlopak

lib/web/fetch/body.js

@@ -320,12 +320,6 @@ function cloneBody (body) {
   }
 }
 
-function throwIfAborted (state) {
-  if (state.aborted) {
-    throw new DOMException('The operation was aborted.', 'AbortError')
-  }
-}
-
 function bodyMixinMethods (instance, getInternalState) {
   const methods = {
     blob () {
@@ -443,19 +437,21 @@ function mixinBody (prototype, getInternalState) {
  * @param {any} instance
  * @param {(target: any) => any} getInternalState
  */
-async function consumeBody (object, convertBytesToJSValue, instance, getInternalState) {
+function consumeBody (object, convertBytesToJSValue, instance, getInternalState) {
   webidl.brandCheck(object, instance)
 
   const state = getInternalState(object)
 
+  if (state.aborted) {
+    return Promise.reject(new DOMException('The operation was aborted.', 'AbortError'))
+  }
+
   // 1. If object is unusable, then return a promise rejected
   //    with a TypeError.
   if (bodyUnusable(state)) {
-    throw new TypeError('Body is unusable: Body has already been read')
+    return Promise.reject(new TypeError('Body is unusable: Body has already been read'))
   }
 
-  throwIfAborted(state)
-
   // 2. Let promise be a new promise.
   const promise = createDeferredPromise()