Allow redirects for requests that require preflight.

third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-access-control.php

Index: third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-access-control.php
diff --git a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-access-control.php b/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-access-control.php
index 4ff7b75a982040aaa2e7b9a2a20038135e524127..908b2b03a416febfdde2fc4a47a87008441d8087 100644
--- a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-access-control.php
+++ b/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-access-control.php
@@ -31,6 +31,17 @@ if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS' && isset($_GET['PreflightTest'])) {
     header("HTTP/1.1 {$_GET['PreflightTest']}");
 }
 
+if (isset($_GET['Redirect'])) {
+    if (isset($_GET['Status'])) {
+        header("HTTP/1.1 $_GET[Status]");
+    } else {
+        header('HTTP/1.1 302');
+    }
+    $url = $_GET['Redirect'];
+    if ($url !== 'noLocation') {
+        header("Location: $url");
+    }
+}
 if (isset($_GET[$prefix . 'ACAOrigin'])) {
     $origins = explode(',', $_GET[$prefix . 'ACAOrigin']);
     for ($i = 0; $i < sizeof($origins); ++$i)
@@ -109,4 +120,4 @@ $arr = array('jsonpResult' => 'success',
              'cookie' => $cookie);
 $json = json_encode($arr);
 echo "report( $json );";
-?>
+?>