Verify that starting a second recognition aborts ongoing one.
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS recognition = new webkitSpeechRecognition(); did not throw exception.
PASS recognition.start() did not throw exception.
PASS secondRecognition = new webkitSpeechRecognition(); did not throw exception.
PASS secondRecognition.start() did not throw exception.
PASS receivedStart is true
PASS event.error is "aborted"
PASS event.message is "Another request is started"
PASS successfullyParsed is true
TEST COMPLETE
