- Mark isolate tests with newly added parameters failing on dart2js. - Specify files needed to be supplied to test harness for spawnUri. BUG= Review URL: https://codereview.chromium.org//1246823002 .
- Pass additional state in the IsolateSpawnState to set error and exit handlers, as well as fatal errors on isolate start. BUG= R=floitsch@google.com Review URL: https://codereview.chromium.org//1244733002 .