service worker: Persist NavigationPreloadState

third_party/WebKit/LayoutTests/http/tests/serviceworker/navigation-preload/resources/wait-for-activate-worker.js

Index: third_party/WebKit/LayoutTests/http/tests/serviceworker/navigation-preload/resources/wait-for-activate-worker.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/serviceworker/navigation-preload/resources/wait-for-activate-worker.js b/third_party/WebKit/LayoutTests/http/tests/serviceworker/navigation-preload/resources/wait-for-activate-worker.js
new file mode 100644
index 0000000000000000000000000000000000000000..bcde69a12486397d3bb2390e48539e86db136e3e
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/http/tests/serviceworker/navigation-preload/resources/wait-for-activate-worker.js
@@ -0,0 +1,40 @@
+// This worker remains in the installing phase so that the
+// navigation preload API can be tested when there is no
+// active worker.
+importScripts('../../../resources/testharness.js');
+importScripts('helpers.js');
+
+function expect_rejection(promise) {
+  return promise.then(
+      () => { return Promise.reject('unexpected fulfillment'); },
+      err => { assert_equals('InvalidStateError', err.name); });
+}
+
+function test_before_activation() {
+  const np = self.registration.navigationPreload;
+  return expect_rejection(np.enable())
+      .then(() => expect_rejection(np.disable()))
+      .then(() => expect_rejection(np.setHeaderValue('hi')))
+      .then(() => np.getState())
+      .then(state => expect_navigation_preload_state(
+          state, false, 'true', 'state should be the default'))
+      .then(() => 'PASS')
+      .catch(err => 'FAIL: ' + err);
+}
+
+var resolve_done_promise;
+var done_promise = new Promise(resolve => { resolve_done_promise = resolve; });
+
+// Run the test once the page messages this worker.
+self.addEventListener('message', e => {
+    e.waitUntil(test_before_activation()
+        .then(result => {
+            e.source.postMessage(result);
+            resolve_done_promise();
+          }));
+  });
+
+// Don't become the active worker until the test is done.
+self.addEventListener('install', e => {
+    e.waitUntil(done_promise);
+  });