Resource Timing: Use original Timing-Allow-Origin for cache validating

LayoutTests/http/tests/css/resources/cors-ahem.php

Index: LayoutTests/http/tests/css/resources/cors-ahem.php
diff --git a/LayoutTests/http/tests/css/resources/cors-ahem.php b/LayoutTests/http/tests/css/resources/cors-ahem.php
new file mode 100644
index 0000000000000000000000000000000000000000..a18850e4048ae46caf6e4224c2c87ac77e140314
--- /dev/null
+++ b/LayoutTests/http/tests/css/resources/cors-ahem.php
@@ -0,0 +1,19 @@
+<?php
+
+if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
+    header("HTTP/1.1 304 Not Modified");
+} else {
+    $font = "../../../../resources/Ahem.ttf";
+
+    header("Cache-Control: public, max-age=86400");
+    header('Last-Modified: ' . gmdate("D, d M Y H:i:s", filemtime($font)) . " GMT");
+    header("Content-Type: font/truetype");
+    header("Content-Length: " . filesize($font));
+    header("Access-Control-Allow-Origin: *");
+    header("Timing-Allow-Origin: *");
+    ob_clean();
+    flush();
+    readfile($font);
+}
+
+?>