LogDog: Use "winio" instead of "npipe".

logdog/client/butler/streamserver/namedPipe_windows.go

Index: logdog/client/butler/streamserver/namedPipe_windows.go
diff --git a/logdog/client/butler/streamserver/namedPipe_windows.go b/logdog/client/butler/streamserver/namedPipe_windows.go
index 09749762620d2fc3dfcc839dc5b672721aeed3ed..fb3d0c025e3a58ce61336c01884ba4b58f12d69e 100644
--- a/logdog/client/butler/streamserver/namedPipe_windows.go
+++ b/logdog/client/butler/streamserver/namedPipe_windows.go
@@ -7,12 +7,13 @@ package streamserver
 import (
 	"net"
 
+	"golang.org/x/net/context"
+
 	"github.com/luci/luci-go/common/errors"
 	log "github.com/luci/luci-go/common/logging"
 	"github.com/luci/luci-go/logdog/client/butlerlib/streamclient"
 
-	"golang.org/x/net/context"
-	npipe "gopkg.in/natefinch/npipe.v2"
+	"github.com/Microsoft/go-winio"
 )
 
 // maxWindowsNamedPipeLength is the maximum length of a Windows named pipe.
@@ -41,7 +42,7 @@ func NewNamedPipeServer(ctx context.Context, name string) (StreamServer, error)
 				"pipePath": pipePath,
 			}.Debugf(ctx, "Creating Windows server socket Listener.")
 
-			l, err := npipe.Listen(pipePath)
+			l, err := winio.ListenPipe(pipePath, nil)
 			if err != nil {
 				return nil, "", errors.Annotate(err).Reason("failed to listen on named pipe").Err()
 			}