codefu@google.com
8d6ffa5af8
When copying old elements in the DeltaAnalyser, skip the members that don't have nodes. When called with null parameters from the completion engine, just return. BUG= TEST= Review URL: http://codereview.chromium.org//9004032 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@2762 260f80e4-7a28-3924-810f-c04153c831b5