Increase the lifetime of Navigation Preload related objects.

third_party/WebKit/LayoutTests/http/tests/serviceworker/navigation-preload/resources/broken-chunked-encoding-worker.js

Index: third_party/WebKit/LayoutTests/http/tests/serviceworker/navigation-preload/resources/broken-chunked-encoding-worker.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/serviceworker/navigation-preload/resources/broken-chunked-encoding-worker.js b/third_party/WebKit/LayoutTests/http/tests/serviceworker/navigation-preload/resources/broken-chunked-encoding-worker.js
new file mode 100644
index 0000000000000000000000000000000000000000..72e763a2a2684c81b2818440db77194160923a9a
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/http/tests/serviceworker/navigation-preload/resources/broken-chunked-encoding-worker.js
@@ -0,0 +1,10 @@
+self.addEventListener('activate', event => {
+    event.waitUntil(
+        self.registration.navigationPreload.enable());
+  });
+
+self.addEventListener('fetch', event => {
+    event.respondWith(event.preloadResponse
+      .then(res => res.text())
+      .then(text => new Response('Done')));

[falken, 2017/01/18 14:24:59]

Do we care what |text| is? Doesn't matter as long as it resolves?

[horo, 2017/01/18 16:14:57]

"event.respondWith(event.preloadResponse)" will result with a blank page.

We can't know whether the blank page is the expected behavior or not. 

[falken, 2017/01/18 16:32:57]

You could do something like:
if (text === '') return new Response('Done');
else return new Response('fail: got text: ' + text);

Or if we really don't care, it's fine as is, I probably would do a comment like
"Don't bother testing |text| since we only care if the test crashes or not".

[horo, 2017/01/18 16:52:06]

Done.

+  });