
FAIL Send and receive messages using a message port in a same origin window. promise_test: Unhandled rejection with value: object "TypeError: handle.createWritable is not a function. (In 'handle.createWritable()', 'handle.createWritable' is undefined)"
FAIL Send and receive messages using a message port in a blob window. promise_test: Unhandled rejection with value: object "TypeError: handle.createWritable is not a function. (In 'handle.createWritable()', 'handle.createWritable' is undefined)"
FAIL Send and receive messages using a message port in a sandboxed same origin window. promise_test: Unhandled rejection with value: object "SyntaxError: The string did not match the expected pattern."