Implement BroadcastChannel

third_party/WebKit/LayoutTests/broadcastchannel/resources/worker.js

Index: third_party/WebKit/LayoutTests/broadcastchannel/resources/worker.js
diff --git a/third_party/WebKit/LayoutTests/broadcastchannel/resources/worker.js b/third_party/WebKit/LayoutTests/broadcastchannel/resources/worker.js
new file mode 100644
index 0000000000000000000000000000000000000000..b8ca643dbdda782e012d01d12bde846140c5f9cd
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/broadcastchannel/resources/worker.js
@@ -0,0 +1,22 @@
+
+function handler(e, reply) {
+  let c = new BroadcastChannel(e.data.channel);
+  let messages = [];
+  c.onmessage = e => {
+      messages.push(e.data);
+      if (e.data == 'done') {
+        if (e.source)
+          e.source.postMessage(messages);
+        else
+          reply(messages);
+      }
+    };
+  c.postMessage('from worker');
+}
+
+onmessage = e => handler(e, postMessage);
+
+onconnect = e => {
+  let port = e.ports[0];
+  port.onmessage = e => handler(e, msg => port.postMessage(msg));
+};