Revert "ServiceWorker: Read the blob from SW's response to a fetch event"

content/test/data/service_worker/fetch_event_error.js

Index: content/test/data/service_worker/fetch_event_error.js
diff --git a/chrome/test/data/extensions/platform_apps/ephemeral_apps/dispatch_event/index.js b/content/test/data/service_worker/fetch_event_error.js
similarity index 57%
copy from chrome/test/data/extensions/platform_apps/ephemeral_apps/dispatch_event/index.js
copy to content/test/data/service_worker/fetch_event_error.js
index dc590d190815d0645476120ece798c9fb5b4db35..e6a30a7be99bee1599309ce3c21159bdbbf933fa 100644
--- a/chrome/test/data/extensions/platform_apps/ephemeral_apps/dispatch_event/index.js
+++ b/content/test/data/service_worker/fetch_event_error.js
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-onload = function() {
-  chrome.test.sendMessage('launched');
+this.onfetch = function(event) {
+    event.respondWith(new Promise(resolve, reject) {
+        reject('rejected!');
+    });
 };