Make Dart_ScriptGetTokenInfo account for line_offset() and col_offset()

Cleanup bugs in wrapExpressionAsClosure Fix bug in how setters were handled and filter out 'this' from local variables list.

BUG=
R=hausner@google.com

Review URL: https://codereview.chromium.org//23526056

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@27581 260f80e4-7a28-3924-810f-c04153c831b5
3 files changed