Set credentials mode "same-origin" when crossOrigin=anonymous is set.

third_party/WebKit/LayoutTests/http/tests/security/resources/abe-cookie-check.php

Index: third_party/WebKit/LayoutTests/http/tests/security/resources/abe-cookie-check.php
diff --git a/third_party/WebKit/LayoutTests/http/tests/security/resources/abe-cookie-check.php b/third_party/WebKit/LayoutTests/http/tests/security/resources/abe-cookie-check.php
new file mode 100644
index 0000000000000000000000000000000000000000..a65f11db6ae7e661583e4678f5c62b7c33d4905b
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/http/tests/security/resources/abe-cookie-check.php
@@ -0,0 +1,22 @@
+<?php
+$cookie_check = $_GET["Cookie"];
+if (isset($cookie_check)) {
+  if ($cookie_check == "NotSet") {
+    if (isset($_COOKIE['TestCookie'])) {
+      header("HTTP/1.0 404 Not Found");
+      exit;
+    }
+  } else if ($cookie_check != $_COOKIE['TestCookie']) {
+    header("HTTP/1.0 404 Not Found");
+    exit;
+  }
+}
+
+$name = 'abe.png';
+$fp = fopen($name, 'rb');
+header("Content-Type: image/png");
+header("Content-Length: " . filesize($name));
+
+fpassthru($fp);
+exit;
+?>