am 3d57823a: am 8a72b6e0: Doc change: Remove more proto scheme from src urls (to fix mixed content warnings).

# Via Android Git Automerger (1) and Dirk Dougherty (1)
* commit '3d57823a2e813ef9d535aab6c40ecbc509f5ab71':
  Doc change: Remove more proto scheme from src urls (to fix mixed content warnings).