[DevTools] show warning if 'Set-Cookie' header length is > 4096 symbols

third_party/WebKit/LayoutTests/http/tests/inspector/network/resources/set-cookie.php

Index: third_party/WebKit/LayoutTests/http/tests/inspector/network/resources/set-cookie.php
diff --git a/third_party/WebKit/LayoutTests/http/tests/inspector/network/resources/set-cookie.php b/third_party/WebKit/LayoutTests/http/tests/inspector/network/resources/set-cookie.php
index b959612bdcd1d50b1806ce987139b9b7375c4425..f4b870105ca201be87e5d0c0e11970618cf44cc1 100644
--- a/third_party/WebKit/LayoutTests/http/tests/inspector/network/resources/set-cookie.php
+++ b/third_party/WebKit/LayoutTests/http/tests/inspector/network/resources/set-cookie.php
@@ -3,7 +3,16 @@
     header("Cache-Control: no-store, no-cache, must-revalidate");
     header("Pragma: no-cache");
     header("Content-Type: text/plain");
-    setcookie("TestCookie", "TestCookieValue");
-
+    header("Access-Control-Allow-Origin: http://127.0.0.1:8000");
+    $length = isset($_GET["length"]) ? (int) $_GET["length"] : 0;
+    if (!$length) {
+      setcookie("TestCookie", "TestCookieValue");
+    } else {
+      $data = "";
+      for ($i = 0; $i < $length; $i++) {
+        $data .= "a";
+      }
+      header("Set-Cookie: $data");
+    }
     echo("Cookie set.");
 ?>