service worker: Fix the type of an update promise reject value

third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/update-worker.php

Index: third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/update-worker.php
diff --git a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/update-worker.php b/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/update-worker.php
index 1f2ebbbc180bf81c7f83f52baff6c511aa3f7b20..81bdd1bfad1df506f65963db78f589aa40b2c9dc 100644
--- a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/update-worker.php
+++ b/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/update-worker.php
@@ -8,6 +8,8 @@ else
 header("Cache-Control: no-cache, must-revalidate");
 header("Pragma: no-cache");
 
+$extra_body = '';
+
 if ($mode == 'init') {
   // Set a normal mimetype.
   // Set cookie value to 'normal' so the next fetch will work in 'normal' mode.
@@ -20,11 +22,21 @@ if ($mode == 'init') {
   setcookie('mode', 'error');
 } else if ($mode == 'error') {
   // Set a disallowed mimetype.
-  // Unset and delete cookie to clean up the test setting.
+  // Set cookie value to 'syntax-error' so the next fetch will work in 'syntax-error' mode.
   header('Content-Type:text/html');
+  setcookie('mode', 'syntax-error');
+} else if ($mode == 'syntax-error') {
+  // Set cookie value to 'throw-install' so the next fetch will work in 'throw-install' mode.
+  header('Content-Type:application/javascript');
+  setcookie('mode', 'throw-install');
+  $extra_body = 'badsyntax(isbad;';
+} else if ($mode == 'throw-install') {
+  // Unset and delete cookie to clean up the test setting.
+  header('Content-Type:application/javascript');
   unset($_COOKIE['mode']);
   setcookie('mode', '', time() - 3600);
+  $extra_body = "addEventListener('install', function(e) { throw new Error('boom'); });";
 }
 // Return a different script for each access.
-echo '// ' . microtime();
+echo '/* ', microtime(), ' */ ', $extra_body;
 ?>