tree db983cfaaf50f96d5d1430fceaf0c019e455b514
parent 50013ddb3d3010d0559a7ddbb611b9caf06f73b8
author steinman <steinman@google.com> 1604688659 -0800
committer Copybara-Service <copybara-worker@google.com> 1604688739 -0800

Refactor WorkRequestHandler to be an interface, of which Proto is one implementation.

This lays the foundation for WorkRequestHandler to be used for JSON workers as well.

RELNOTES: None.
PiperOrigin-RevId: 341078345