postMessage() should throw a DataCloneError on invalid transferables

LayoutTests/fast/workers/worker-context-multi-port-expected.txt

Index: LayoutTests/fast/workers/worker-context-multi-port-expected.txt
diff --git a/LayoutTests/fast/workers/worker-context-multi-port-expected.txt b/LayoutTests/fast/workers/worker-context-multi-port-expected.txt
index 8f403ab8138f81b89ec5f024d58266557c8fc986..548d5ea4f1a5a5aeddef6fd5d1e3a517eedc24c4 100644
--- a/LayoutTests/fast/workers/worker-context-multi-port-expected.txt
+++ b/LayoutTests/fast/workers/worker-context-multi-port-expected.txt
@@ -6,11 +6,11 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE
 PASS event.ports is non-null and zero length when no port sent
 PASS event.ports is non-null and zero length when empty array sent
 PASS event.ports contains two ports when two ports sent
-PASS posting a null port did throw: InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable.
-PASS posting a non-port did throw: TypeError: Type error
+PASS posting a null port did throw: DataCloneError: An object could not be cloned.
+PASS posting a non-port did throw: DataCloneError: An object could not be cloned.
 PASS event.ports contains two ports when two ports re-sent after error
 PASS posting a non-array did throw: TypeError: Type error
-PASS posting a non-sequence did throw: TypeError: Type error
+PASS posting a non-sequence did throw: DataCloneError: An object could not be cloned.
 
 TEST COMPLETE