ServiceWorker: Add layout test for WindowClient.navigate().

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

+var port = null;
+
+self.onmessage = function(e) {
+  if (!port && e.data.port) {
+    port = e.data.port;
+    return;
+  }

[nhiroki, 2015/10/08 09:19:06]

You could remove this hack if the document sends urls via "port1.postMessage"
instead of "worker.postMessage":

<doc>                           <worker>
worker.postMessage(port2)  -->  self.onmessage(port2)
port1.onmessage(msg)       <--  port2.postMessage("ready")
port1.postMessage(url1)    -->  port2.onmessage(url1)
port1.onmessage(res1)      <--  port2.postMessage(res1)
port1.postMessage(url2)    -->  port2.onmessage(url2)
...


self.onmessage = function(e) {
  port = e.data.port;
  port.onmessage = onmessage;
  port.postMessage('ready');
}

function onmessage(e) {
  var url = e.data;
  ...
}

[zino, 2015/10/08 13:35:36]

Done.

+
+  var url = e.data;
+  var client;
+
+  self.clients.matchAll({ includeUncontrolled : true }).then(function(cs) {
+        cs.forEach(function(c) {
+              if (c.frameType == 'nested')
+                client= c;

[nhiroki, 2015/10/08 09:19:06]

nit: space before '='

[zino, 2015/10/08 13:35:36]

Done.

+            });
+        client.navigate(url).then(function(c) {

[nhiroki, 2015/10/08 09:19:06]

nit: To unindent, you might want to return a promise returned by navigate(url)
and chain 'then' block like this:

self.clients.matchAll().then(function(cs) {
      // snip
      return client.navigate(url);
    })
  .then(function(c) {
      // snip
    })
  .catch(function(e) {
      // snip
    });

[zino, 2015/10/08 13:35:36]

Done.

+              if (!c)
+                port.postMessage(c);
+              else
+                port.postMessage(c.url);
+            })
+          .catch(function(e) {
+              port.postMessage(e.name);
+            });
+      });
+};