Upstream service worker "request" tests to WPT

third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/request-end-to-end-worker.js

Index: third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/request-end-to-end-worker.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/request-end-to-end-worker.js b/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/request-end-to-end-worker.js
index dc3679092e7fed6ab7ca8a2c6ba1fec655fa2ede..ae6bc1bb42012a58889776efb16c51818e05bf86 100644
--- a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/request-end-to-end-worker.js
+++ b/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/request-end-to-end-worker.js
@@ -1,9 +1,4 @@
 onfetch = function(e) {
-  var headers = {};
-  for (var header of e.request.headers) {
-    var key = header[0], value = header[1];
-    headers[key] = value;
-  }
   var append_header_error = '';
   try {
     e.request.headers.append('Test-Header', 'TestValue');
@@ -22,7 +17,6 @@ onfetch = function(e) {
     url: e.request.url,
     method: e.request.method,
     referrer: e.request.referrer,
-    headers: headers,
     mode: e.request.mode,
     credentials: e.request.credentials,
     redirect: e.request.redirect,