Properly handle synchronous errors in Chain.capture.

R=rnystrom@google.com
BUG=19542

Review URL: https://codereview.chromium.org//344953002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/stack_trace@37520 260f80e4-7a28-3924-810f-c04153c831b5
4 files changed
tree: 5e4fbfe01e631d04845f6f4f5bd9b382142ddf52
  1. pkgs/