chrome.cast class tests

ext/src/shim/cast/classes/ApiConfig.js

@@ -16,5 +16,9 @@ export default class ApiConfig {
         this.receiverListener = receiverListener;
         this.sessionListener = sessionListener;
         this.sessionRequest = sessionRequest;
+
+        this.additionalSessionRequests = [];
+        this.customDialLaunchCallback = null;
+        this.invisibleSender = false;
     }
 };

ext/src/shim/cast/classes/Receiver.js

@@ -8,9 +8,7 @@ export default class Receiver {
     constructor (
             label
           , friendlyName
-          , opt_capabilities = [
-                Capability.VIDEO_OUT
-              , Capability.AUDIO_OUT ]
+          , opt_capabilities = []
           , opt_volume = null) {
 
         this.capabilities = opt_capabilities;