LogDog: CLI can use stream URLs, fix auth.

logdog/client/cmd/logdog/main.go

Index: logdog/client/cmd/logdog/main.go
diff --git a/logdog/client/cmd/logdog/main.go b/logdog/client/cmd/logdog/main.go
index 03df79e62894af9ae4c37d2a89997e65f7ab9b0a..ad345958080d0311ad8b322c33289004b7ecaaad 100644
--- a/logdog/client/cmd/logdog/main.go
+++ b/logdog/client/cmd/logdog/main.go
@@ -8,6 +8,7 @@ import (
 	"os"
 
 	"github.com/luci/luci-go/common/data/rand/mathrand"
+	"github.com/luci/luci-go/hardcoded/chromeinfra"
 	"github.com/luci/luci-go/logdog/client/cli"
 
 	"golang.org/x/net/context"
@@ -16,6 +17,7 @@ import (
 func main() {
 	mathrand.SeedRandomly()
 	os.Exit(cli.Main(context.Background(), cli.Parameters{
-		Args: os.Args[1:],
+		Args:               os.Args[1:],
+		DefaultAuthOptions: chromeinfra.DefaultAuthOptions(),
 	}))
 }