0c66cef0d9
- Single step now steps to a safe point on the next line. - Step into no longer steps into library code. - Each library has a flag that specifies whether one can step into its code. Later I will add an API to set the per-library flag. Currently it's set to true for the top-level library and to false for all other libraries. Review URL: https://chromiumcodereview.appspot.com//10442088 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@8173 260f80e4-7a28-3924-810f-c04153c831b5