Sync with 7537f30
Sync with 7537f30

Synced with dart-lang/site-webdev master branch, commit 7537f30:
https://github.com/dart-lang/site-webdev/tree/7537f30dd657292821e343ecd2c4c1c638ce15f6/examples/ng/doc/router

angular-examples/router,googlearchive/router,googlearchive/router,angular-examples/router