postMessage() should throw a DataCloneError on invalid transferables

LayoutTests/fast/events/resources/message-port-multi.js

 if (window.testRunner) {
     testRunner.dumpAsText();
     testRunner.waitUntilDone();
 }
 
 description("This test checks the various use cases around sending multiple ports through MessagePort.postMessage");
 
 var channel = new MessageChannel();
 var channel2 = new MessageChannel();
 var channel3 = new MessageChannel();
 var channel4 = new MessageChannel();
 
 channel.port1.postMessage("noport");
 channel.port1.postMessage("zero ports", []);
 channel.port1.postMessage("two ports", [channel2.port1, channel2.port2]);
 
 // Now test various failure cases
-shouldThrow('channel.port1.postMessage("same port", [channel.port1])');
-shouldThrow('channel.port1.postMessage("entangled port", [channel.port2])');
-shouldThrow('channel.port1.postMessage("null port", [channel3.port1, null, channel3.port2])');
-shouldThrow('channel.port1.postMessage("notAPort", [channel3.port1, {}, channel3.port2])');
-shouldThrow('channel.port1.postMessage("duplicate port", [channel3.port1, channel3.port1])');
+shouldThrow('channel.port1.postMessage("same port", [channel.port1])', "'DataCloneError: An object could not be cloned.'");
+shouldThrow('channel.port1.postMessage("entangled port", [channel.port2])', "'DataCloneError: An object could not be cloned.'");
+shouldThrow('channel.port1.postMessage("null port", [channel3.port1, null, channel3.port2])', "'DataCloneError: An object could not be cloned.'");
+shouldThrow('channel.port1.postMessage("notAPort", [channel3.port1, {}, channel3.port2])', "'DataCloneError: An object could not be cloned.'");
+shouldThrow('channel.port1.postMessage("duplicate port", [channel3.port1, channel3.port1])', "'DataCloneError: An object could not be cloned.'");
 // Should be OK to send channel3.port1 (should not have been disentangled by the previous failed calls).
 channel.port1.postMessage("entangled ports", [channel3.port1, channel3.port2]);
 
-shouldThrow('channel.port1.postMessage("notAnArray", channel3.port1)')
-shouldThrow('channel.port1.postMessage("notASequence", [{length: 3}])');
+shouldThrow('channel.port1.postMessage("notAnArray", channel3.port1)', "'TypeError: Type error'")
+shouldThrow('channel.port1.postMessage("notASequence", [{length: 3}])', "'DataCloneError: An object could not be cloned.'");
 
 // Should not crash (we should figure out that the array contains undefined
 // entries).
 var largePortArray = [];
 largePortArray[1234567890] = channel4.port1;
-shouldThrow('channel.port1.postMessage("largeSequence", largePortArray)');
+shouldThrow('channel.port1.postMessage("largeSequence", largePortArray)', "'DataCloneError: An object could not be cloned.'");
 
 channel.port1.postMessage("done");
 
 function testTransfers() {
     var channel0 = new MessageChannel();
 
     var c1 = new MessageChannel();
     channel0.port1.postMessage({id:"send-port", port:c1.port1}, [c1.port1]);
     var c2 = new MessageChannel();
     channel0.port1.postMessage({id:"send-port-twice", port0:c2.port1, port1:c2.port1}, [c2.port1]);
@@ skipping 94 matching lines @@
         if (event.ports.length == 2)
             testPassed("event.ports contains two ports when two ports re-sent after error");
         else
             testFailed("event.ports contained " + event.ports.length + " when two ports re-sent after error");
     } else if (event.data == "done") {
         testTransfers();
     } else
         testFailed("Received unexpected message: " + event.data);
 }