(Re)organize handling of CORS access control during resource loading.

LayoutTests/http/tests/security/resources/cors-script.php

Index: LayoutTests/http/tests/security/resources/cors-script.php
diff --git a/LayoutTests/http/tests/security/resources/cors-script.php b/LayoutTests/http/tests/security/resources/cors-script.php
index c9b1a37d4f3463d9a2c2e3041d3a975465dbde74..1023855ad8bce0394468b3230c289470d31a8b5f 100644
--- a/LayoutTests/http/tests/security/resources/cors-script.php
+++ b/LayoutTests/http/tests/security/resources/cors-script.php
@@ -7,6 +7,9 @@ if (strtolower($_GET["credentials"]) == "true") {
 }
 header("Content-Type: application/javascript");
 $value = $_GET['value'];
+if ($_SERVER['HTTP_ORIGIN'] && $_GET['value_cors']) {
+    $value = $_GET['value_cors'];
+}
 if ($value)
     echo "result = \"" . $value . "\";";
 else if (strtolower($_GET["fail"]) == "true")