Make registration.update() no longer force bypassing the HTTP cache (1/2)

LayoutTests/http/tests/serviceworker/ServiceWorkerGlobalScope/resources/update-worker.php

Index: LayoutTests/http/tests/serviceworker/ServiceWorkerGlobalScope/resources/update-worker.php
diff --git a/LayoutTests/http/tests/serviceworker/ServiceWorkerGlobalScope/resources/update-worker.php b/LayoutTests/http/tests/serviceworker/ServiceWorkerGlobalScope/resources/update-worker.php
index 2486820c26c5f6483270a2d15f6527ec3ee11662..6a18bcafc846b1c0a1fbc0b04df470ebed5318b4 100644
--- a/LayoutTests/http/tests/serviceworker/ServiceWorkerGlobalScope/resources/update-worker.php
+++ b/LayoutTests/http/tests/serviceworker/ServiceWorkerGlobalScope/resources/update-worker.php
@@ -1,7 +1,7 @@
 <?php
-// Force the browser to cache this script. update() should always bypass this
-// cache and fetch a new version.
-header('Cache-Control: max-age=86400');
+// update() does not bypass cache so set the max-age to 0 such that update()
+// can find a new version in the network.
+header('Cache-Control: max-age=0');
 
 // Return a different script for each access.
 header('Content-Type:application/javascript');