Update image data upon changing the img.crossorigin attribute.

LayoutTests/http/tests/resources/origin.php

Index: LayoutTests/http/tests/resources/origin.php
diff --git a/LayoutTests/http/tests/resources/origin.php b/LayoutTests/http/tests/resources/origin.php
index 5a34e3add306dbde64ed6a3d30e86ee8087f6b9c..7177cb3849b88cf30cb55a2c64d890d61e554420 100644
--- a/LayoutTests/http/tests/resources/origin.php
+++ b/LayoutTests/http/tests/resources/origin.php
@@ -1,16 +1,4 @@
 <?php
-
-$gotOrigin = 0;
-foreach (getallheaders() as $name => $value) {
-    if ($name == "Origin") {
-        $gotOrigin = 1;
-    }
-}
-
-if ($gotOrigin) {
-    header('Location: square100.png');
-}
-else {
-    header('Location: square200.png');
-}
-header('HTTP/1.1 302 Redirect');
+header('HTTP/1.1 302 Found');
+header('Location: ' . ($_SERVER['HTTP_ORIGIN'] ? 'square100.png' : 'square200.png'));
+?>