Sync with 402a419
Sync with 402a419

Synced with dart-lang/site-webdev 5-dev branch, commit 402a419:
https://github.com/dart-lang/site-webdev/tree/402a419edf2957f36598229efd382510a5f64bd4/examples/ng/doc/attribute-directives

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