Test <img crossorigin> handling of 401 responses.

LayoutTests/http/tests/security/resources/img-basic-auth.php

Index: LayoutTests/http/tests/security/resources/img-basic-auth.php
diff --git a/LayoutTests/http/tests/security/resources/img-basic-auth.php b/LayoutTests/http/tests/security/resources/img-basic-auth.php
new file mode 100644
index 0000000000000000000000000000000000000000..3f60617c7ff8e76bfef971ad5f60cf44e85f2e36
--- /dev/null
+++ b/LayoutTests/http/tests/security/resources/img-basic-auth.php
@@ -0,0 +1,15 @@
+<?php
+if (!isset($_SERVER['PHP_AUTH_USER']) || !isset($_REQUEST['uid']) || $_REQUEST['uid'] != $_SERVER['PHP_AUTH_USER']) {
+    header('WWW-Authenticate: Basic realm="blink test realm"');
+    header('HTTP/1.0 401 Unauthorized');
+    echo 'Authentication cancelled.';
+} else {
+    header("Access-Control-Allow-Origin: *");
+    $name = 'abe.png';
+    $fp = fopen($name, 'rb');
+    header("Content-Type: image/png");
+    header("Content-Length: " . filesize($name));
+    header('HTTP/1.0 200 OK');
+    fpassthru($fp);
+}
+?>