dart2js: Add support for static fields to new emitter.

R=kasperl@google.com

Review URL: https://codereview.chromium.org//661783002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41160 260f80e4-7a28-3924-810f-c04153c831b5
dart2js: Add interceptors to new emitter.

R=kasperl@google.com

Review URL: https://codereview.chromium.org//662663003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41161 260f80e4-7a28-3924-810f-c04153c831b5
dart2js: Remove unused function in new emitter.

Review URL: https://codereview.chromium.org//635273003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41162 260f80e4-7a28-3924-810f-c04153c831b5