Refactor gerrit recipe

- move chrome binary rename & path stuff into existing helper
- move downloading change into a helper
- add more documentation & api reference links

Change-Id: I58e8878373cfd7bc2632849a01b58c7db41b7339
2 files changed
tree: 2445bfdd3ffab14ba9ba466ebf69edf902d40acb
  1. generated/
  2. infra/
  3. recipes/
  4. .gitignore
  5. main.star