503e2219b8
This change introduces variable descriptors that describe the name, stack slot index, and source code stretch in which a variable is valid. Activation frames in the stack trace now can enumerate the variables that are active in that frame. Next step: fetch the value of variables from the stack. Review URL: http://codereview.chromium.org//8992020 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@2671 260f80e4-7a28-3924-810f-c04153c831b5