Delete sunflower from the repo, update dart2js_batch_test to use new location of
sunflower in third_party that is pulled in via DEPS.

Review URL: https://codereview.chromium.org//821823002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42558 260f80e4-7a28-3924-810f-c04153c831b5
Update a couple other references to sunflower that I missed

R=nweiz
BUG=

Review URL: https://codereview.chromium.org//825553002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42559 260f80e4-7a28-3924-810f-c04153c831b5
Fix name of spawnIsolate to spawn.

Review URL: https://codereview.chromium.org//808373003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42560 260f80e4-7a28-3924-810f-c04153c831b5