Sync with 025fd1d
Sync with 025fd1d

Synced with angular/angular.io chalin-beta-21-0907 branch, commit 025fd1d:
https://github.com/chalin/angular.io/tree/025fd1dd85dd7ce317095f932537e8270df56ce2/public/docs/_examples/architecture/dart

angular-examples/architecture,angular-examples/architecture,googlearchive/architecture,googlearchive/architecture