Updated cq_client

third_party/cq_client/README.md

 This directory contains CQ client library to be distributed to other repos. If
 you need to modify some files in this directory, please make sure that you are
 changing the canonical version of the source code and not one of the copies,
 which should only be updated as a whole using Glyco (when available, see
 [chromium issue 489420](http://crbug.com/489420)).
 
 The canonical version is located at `https://chrome-internal.googlesource.com/
 infra/infra_internal/+/master/commit_queue/cq_client`.
 
-To generate `cq_pb2.py` and `cq.pb.go`, please use protoc version 2.6.1:
+You'll need to use protoc version 2.6.1 and
+recent golang/protobuf package. Sadly, the latter has no tags no versions.

[Adrian Kuegel, 2015/11/27 10:16:11]

"no tags no versions" -> did you mean "neither tags nor versions"?

[Sergiy Byelozyorov, 2015/11/27 10:18:56]

+tandrii: please address these comments in the source and push a new version to
depot_tools

+
+You can get protobuf by downloading archive from https://github.com/google/protobuf/tree/v2.6.1,

[Adrian Kuegel, 2015/11/27 10:16:12]

nit: Can you put the URL in the next line please?

[Sergiy Byelozyorov, 2015/11/27 10:18:56]

+tandrii: please address these comments in the source and push a new version to
depot_tools

+and manually building it. As for golang compiler, if you have go configured,
+just
+
+    go get -u github.com/golang/protobuf/{proto,protoc-gen-go}
+
+TODO(tandrii,sergiyb): decide how to pin the go protobuf generator.
+
+To generate `cq_pb2.py` and `cq.pb.go`:
 
     cd commit_queue/cq_client
     protoc cq.proto --python_out $(pwd) --go_out $(pwd)
 
 Additionally, please make sure to use proto3-compatible syntax, e.g. no default
 values, no required fields. Ideally, we should use proto3 generator already,
 however alpha version thereof is still unstable.
+