Sync with ac5a1d4
Sync with ac5a1d4

Synced with dart-lang/site-webdev master branch, commit ac5a1d4:
https://github.com/dart-lang/site-webdev/tree/ac5a1d4e6dddbff01b19afea048a938dafae1429/examples/ng/doc/pipes

angular-examples/pipes,googlearchive/pipes,angular-examples/pipes,googlearchive/pipes