Import w3c tests for the service workers

third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/navigation-redirect-worker.js

+// We store an empty response for each fetch event request we see
+// in this Cache object so we can get the list of urls in the
+// message event.
+var cacheName = 'urls-' + self.registration.scope;
+
+var waitUntilPromiseList = [];
+
+self.addEventListener('message', function(event) {
+    var urls;
+    event.waitUntil(Promise.all(waitUntilPromiseList).then(function() {
+      waitUntilPromiseList = [];
+      return caches.open(cacheName);
+    }).then(function(cache) {
+      return cache.keys();
+    }).then(function(requestList) {
+      urls = requestList.map(function(request) { return request.url; });
+      return caches.delete(cacheName);
+    }).then(function() {
+      event.data.port.postMessage({urls: urls});
+    }));
+  });
+
+function get_query_params(url) {
+  var search = (new URL(url)).search;
+  if (!search) {
+    return {};
+  }
+  var ret = {};
+  var params = search.substring(1).split('&');
+  params.forEach(function(param) {
+      var element = param.split('=');
+      ret[decodeURIComponent(element[0])] = decodeURIComponent(element[1]);
+    });
+  return ret;
+}
+
+self.addEventListener('fetch', function(event) {
+    var waitUntilPromise = caches.open(cacheName).then(function(cache) {
+      return cache.put(event.request, new Response());
+    });
+    event.waitUntil(waitUntilPromise);
+
+    var params = get_query_params(event.request.url);
+    if (!params['sw']) {
+      // To avoid races, add the waitUntil() promise to our global list.
+      // If we get a message event before we finish here, it will wait
+      // these promises to complete before proceeding to read from the
+      // cache.
+      waitUntilPromiseList.push(waitUntilPromise);
+      return;
+    }
+
+    event.respondWith(waitUntilPromise.then(function() {
+      if (params['sw'] == 'gen') {
+        return Response.redirect(params['url']);
+      } else if (params['sw'] == 'fetch') {
+        return fetch(event.request);
+      } else if (params['sw'] == 'opaque') {
+        return fetch(new Request(event.request.url, {redirect: 'manual'}));
+      } else if (params['sw'] == 'opaqueThroughCache') {
+        var url = event.request.url;
+        var cache;
+        return caches.delete(url)
+          .then(function() { return self.caches.open(url); })
+          .then(function(c) {
+            cache = c;
+            return fetch(new Request(url, {redirect: 'manual'}));
+          })
+          .then(function(res) { return cache.put(event.request, res); })
+          .then(function() { return cache.match(url); });
+      }
+
+      // unexpected... trigger an interception failure
+    }));
+  });