Fix regression in TypedefMirror.owner introduced when making ClassMirror.owner lazy.

R=asiva@google.com

Review URL: https://codereview.chromium.org//19749008

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@25244 260f80e4-7a28-3924-810f-c04153c831b5
2 files changed