Add @proxy to annotations.dart.
Add @proxy to annotations.dart.

Remove package:meta

R=bak@google.com, brianwilkerson@google.com

Review URL: https://codereview.chromium.org//46593003

git-svn-id: a8f079e7cfc3a289d8496d7b88aabbd5c45a3053@29525 260f80e4-7a28-3924-810f-c04153c831b5

astashov/intl,dart-lang/intl,astashov/intl