Update APIs to use new Google cloud paths.

grpc/cmd/rpc/show.go

Index: grpc/cmd/rpc/show.go
diff --git a/grpc/cmd/rpc/show.go b/grpc/cmd/rpc/show.go
index 30cd642db47b60ad85fc73d4fe0c5878e088a8d5..8e0a6048b16ce9bef3e132df5ef87d0819802166 100644
--- a/grpc/cmd/rpc/show.go
+++ b/grpc/cmd/rpc/show.go
@@ -11,9 +11,10 @@ import (
 
 	"github.com/maruel/subcommands"
 	"golang.org/x/net/context"
+	"google.golang.org/genproto/protobuf"
 
 	"github.com/luci/luci-go/common/cli"
-	"github.com/luci/luci-go/common/proto/google/descriptor"
+	"github.com/luci/luci-go/common/proto/google/descutil"
 	"github.com/luci/luci-go/grpc/prpc"
 )
 
@@ -75,7 +76,7 @@ func show(c context.Context, client *prpc.Client, name string) error {
 		return nil
 	}
 
-	file, obj, path := desc.Description.Resolve(name)
+	file, obj, path := descutil.Resolve(desc.Description, name)
 	if obj == nil {
 		return fmt.Errorf("name %q could not resolved", name)
 	}
@@ -94,7 +95,7 @@ func show(c context.Context, client *prpc.Client, name string) error {
 
 		printMsg := func(name string) {
 			name = strings.TrimPrefix(name, ".")
-			file, msg, path := desc.Description.Resolve(name)
+			file, msg, path := descutil.Resolve(desc.Description, name)
 			if msg == nil {
 				print.Printf("// Message %q is not found\n", name)
 				return