Import w3c tests for the service workers

third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/clients-matchall-worker.js

+self.onmessage = function(e) {
+  var port = e.data.port;
+  var options = e.data.options;
+
+  self.clients.matchAll(options).then(function(clients) {
+      var message = [];
+      clients.forEach(function(client) {
+          var frame_type = client.frameType;
+          if (client.url.indexOf('clients-matchall-include-uncontrolled.https.html') > -1 &&
+              client.frameType == 'auxiliary') {
+            // The test tab might be opened using window.open() by the test framework.
+            // In that case, just pretend it's top-level!
+            frame_type = 'top-level';
+          }
+          message.push([client.visibilityState,
+                        client.focused,
+                        client.url,
+                        frame_type]);
+        });
+      // Sort by url
+      message.sort(function(a, b) { return a[2] > b[2] ? 1 : -1; });
+      port.postMessage(message);
+    });
+};