Two main incompatibilities existed in the copy of protos in grpc-proto:
no SimpleContext and an Empty method argument was replaced with a
message. "Context" is a very old word for "Metadata" back from the days
before the current gRPC protocol. We don't need that message in
particular, and well-known protos actually works in Protobuf Lite these
days, so we can swap to wrappers.proto's StringValue and don't need to
upstream a change to grpc-proto. The argument problem is fixed just by
changing the type in the Java code.
With the incompatibilities fixed, do a sync from grpc-proto and include
interop-testing.
Currently only protos in alts, grpclb, and services are synced. Once
some java_package options are "upstreamed", benchmarks and
interop-testing could also be synced.
Riya Mehta