tree 03fa493ef7820d1224d479de43108da929998fdf
parent 292a74a82a45b4968f045f6b42081698cae119c6
author Joe Tsai <joetsai@digital-static.net> 1555441988 -0700
committer Joe Tsai <thebrokentoaster@gmail.com> 1555457564 +0000

proto: drop dependence on v2 protoimpl.ExtensionFieldsV2

The v2 protoimpl.ExtensionFieldsV2 is now just an alias
to an unnamed map, which simplifies our implementation.
Also, we can drop all synchronization since we now eagerly
unmarshal extension fields.

Change-Id: I4baa31e3d610d04d702686a489ebdb5e246276ab
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/172437
Reviewed-by: Damien Neil <dneil@google.com>