Sync with c5ff08d
Sync with c5ff08d

Synced with angular/angular.io chalin-chore-dart-ex-hosting-0604 branch, commit c5ff08d:
https://github.com/chalin/angular.io/tree/c5ff08de268de7b5f6584a3c870b374281200869/public/docs/_examples/attribute-directives/dart

googlearchive/attribute-directives,googlearchive/attribute-directives,angular-examples/attribute-directives,angular-examples/attribute-directives