Sync with 7b91fb7
Sync with 7b91fb7

Synced with dart-lang/site-webdev 4-dev branch, commit 7b91fb7:
https://github.com/dart-lang/site-webdev/tree/7b91fb78decd00b545ec12081a6922442cd496a7/examples/ng/doc/security

googlearchive/security,googlearchive/security,angular-examples/security,angular-examples/security