Update unit tests

R=johnniwinther@google.com

Review URL: https://codereview.chromium.org//789873003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42507 260f80e4-7a28-3924-810f-c04153c831b5
More tests of incremental compilation involving multiple libraries.

R=johnniwinther@google.com

Review URL: https://codereview.chromium.org//818713002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42508 260f80e4-7a28-3924-810f-c04153c831b5
Capture and report all exceptions in server

Review URL: https://codereview.chromium.org//811223002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42509 260f80e4-7a28-3924-810f-c04153c831b5