Add tests regarding fields.

For now, the tests are failing.

R=johnniwinther@google.com

Review URL: https://codereview.chromium.org//800443002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42310 260f80e4-7a28-3924-810f-c04153c831b5
Test compound constants and constants of new classes.

For now, one of the tests is failing.

R=johnniwinther@google.com

Review URL: https://codereview.chromium.org//797643002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42311 260f80e4-7a28-3924-810f-c04153c831b5
Revert "Revert "Revert "Disable the irregexp backend."""

This enables the irregexp backend by reverting commit
http://code.google.com/p/dart/source/detail?r=42246

R=fschneider@google.com
BUG=

Review URL: https://codereview.chromium.org//800453003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42312 260f80e4-7a28-3924-810f-c04153c831b5