Upstream service worker `claim` tests to WPT

third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/update-claim-worker.py

Index: third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/update-claim-worker.py
diff --git a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/update-claim-worker.php b/third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/update-claim-worker.py
similarity index 57%
copy from third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/update-claim-worker.php
copy to third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/update-claim-worker.py
index bd75fc1345f8499cedbae120976eeeb3513885c6..551246c96abfc88752a2b9695f454dc1b8fdb769 100644
--- a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/update-claim-worker.php
+++ b/third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/update-claim-worker.py
@@ -1,10 +1,9 @@
-<?php
-header("Cache-Control: no-cache, must-revalidate");
-header("Pragma: no-cache");
-header('Content-Type:application/javascript');
+import time
 
-echo '// ', microtime();
-?>
+script = '''
+// Time stamp: %s
+// (This ensures the source text is *not* a byte-for-byte match with any
+// previously-fetched version of this script.)

[mike3, 2017/03/23 15:56:55]

This is becoming something of a pattern in WPT. I plan to follow-up with a
generalized "prefix timestamp" Python handler in WPT.

 
 // This no-op fetch handler is necessary to bypass explicitly the no fetch
 // handler optimization by which this service worker script can be skipped.
@@ -18,4 +17,8 @@ addEventListener('install', event => {
 
 addEventListener('activate', event => {
     event.waitUntil(self.clients.claim());
-  });
+  });'''
+
+
+def main(request, response):
+  return [('Content-Type', 'application/javascript')], script % time.time()