Upstream service wrkr "window client" test to WPT

third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/windowclient-navigate-worker.js

-function match_query(query_string) {
-  return self.location.search.substr(1) == query_string;
-}
-
-function receive_event(event_name) {
-  return new Promise(function(resolve) {
-        self.addEventListener(event_name, resolve, false);
-      });
-}
-
-function navigate_test(e) {
-  var port = e.data.port;
-  var url = e.data.url;
-
-  return clients.matchAll({ includeUncontrolled : true })
-    .then(function(client_list) {
-        for (var i = 0; i < client_list.length; i++) {
-          var client = client_list[i];
-          if (client.frameType == 'nested') {
-            return client.navigate(url);
-          }
-        }
-        port.postMessage('Could not found window client.');
-      })
-    .then(function(new_client) {
-        if (new_client === null)
-          port.postMessage(new_client);
-        else
-          port.postMessage(new_client.url);
-      })
-    .catch(function(error) {
-        port.postMessage(error.name);
-      });
-}
-if (match_query('installing')) {
-  // If the query string is "?installing", then do test on installing worker.
-  // This is only for in-scope-but-not-controlled test.
-  receive_event('install').then(function(e) {
-      e.waitUntil(receive_event('message').then(navigate_test));
-    });
-} else {
-  receive_event('message').then(function(e) {
-      e.waitUntil(navigate_test(e));
-    });
-}