Make WebSocket available again in service workers

third_party/WebKit/LayoutTests/http/tests/serviceworker/websocket/resources/simple.js

+let port;
+let received = false;
+
+function reportFailure(details) {
+    port.postMessage('FAIL: ' + details);
+}
+
+onmessage = event => {
+    port = event.source;
+
+    const ws = new WebSocket('ws://localhost:8880/echo');
+    ws.onopen = () => {
+        ws.send('Hello');
+    };
+    ws.onmessage = msg => {
+        if (msg.data !== 'Hello') {
+            reportFailure('Unexpected reply: ' + msg.data);
+            return;
+        }
+
+        received = true;
+        ws.close();
+    };
+    ws.onclose = () => {
+        if (!received) {
+            reportFailure('Closed before receiving reply');
+        }
+
+        port.postMessage('PASS');
+    };
+    ws.onerror = () => {
+        reportFailure('Got an error event');
+    };
+};

[falken, 2016/12/08 13:12:29]

sorry I gave a bad review about simple.js formatting. the original formatting
was correct since none of these functions are function arguments. so basically
this whole file should be two-space indent, not four. i.e.:

function a(b) {
  // two space indent
  console.log('hi');
}

onmessage = function(a) {
  // two space indent
  console.log('hi');
};

is actually correct. but we would do:

.then(r => {
    add_completion_callback(...)
  });

as in websocket-in-service-worker.html since the function is an argument to
then().

[tyoshino (SeeGerritForStatus), 2016/12/08 13:50:04]

Oops. No. It's my bad, sorry. I was hurried and misunderstood that SW
directories are still using 4sp indent. You were talking about lines right after
line wrapping for e.g. { and (.

Fixed!