Exclude simple headers when building Access-Control-Request-Headers

third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/resources/access-control-preflight-request-header-sorted.php

Index: third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/resources/access-control-preflight-request-header-sorted.php
diff --git a/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/resources/access-control-preflight-request-header-sorted.php b/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/resources/access-control-preflight-request-header-sorted.php
index b52580f312de82dc3df4d259825210a038e42177..7b93ce761c0101395bf7c5ab63c51c7155bb2c73 100644
--- a/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/resources/access-control-preflight-request-header-sorted.php
+++ b/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/resources/access-control-preflight-request-header-sorted.php
@@ -1,11 +1,13 @@
 <?php
 if ($_SERVER["REQUEST_METHOD"] == "OPTIONS") {
-    // Check that the names in Access-Control-Request-Headers are
-    // "sorted lexicographically, and byte lowercased".
+    // Check the Access-Control-Request-Headers that:
+    // - simple headers are not included
+    // - names in it are sorted lexicographically and byte lowercased
+    //
     // Fetch API Spec: https://fetch.spec.whatwg.org/#cors-preflight-fetch-0
     if ($_SERVER["HTTP_ACCESS_CONTROL_REQUEST_HEADERS"] ==
-        'content-type, x-custom-s, x-custom-test, x-custom-u, x-custom-ua, x-custom-v') {
-        header("Access-Control-Allow-Headers: content-type, x-custom-s, x-custom-test, x-custom-u, x-custom-ua, x-custom-v");
+        'x-custom-s, x-custom-test, x-custom-u, x-custom-ua, x-custom-v') {
+        header("Access-Control-Allow-Headers: x-custom-s, x-custom-test, x-custom-u, x-custom-ua, x-custom-v");
     } else {
         header("HTTP/1.1 400");
     }