Make HTTP middleware easier to use

appengine/cmd/logdog_coordinator/backend/main.go

Index: appengine/cmd/logdog_coordinator/backend/main.go
diff --git a/appengine/cmd/logdog_coordinator/backend/main.go b/appengine/cmd/logdog_coordinator/backend/main.go
index 323ebdfad58a30cbeb2839411860e8f320853223..04122a24c599cd926c06617af1bda6ba20dc2d93 100644
--- a/appengine/cmd/logdog_coordinator/backend/main.go
+++ b/appengine/cmd/logdog_coordinator/backend/main.go
@@ -2,36 +2,36 @@
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package module
 
 import (
 	"net/http"
 
 	"golang.org/x/net/context"
 
-	"github.com/julienschmidt/httprouter"
 	"github.com/luci/luci-go/appengine/logdog/coordinator"
 	"github.com/luci/luci-go/appengine/logdog/coordinator/config"
 	"github.com/luci/luci-go/appengine/tumble"
+	"github.com/luci/luci-go/server/router"
 
 	// Include mutations package so its Mutations will register with tumble via
 	// init().
 	_ "github.com/luci/luci-go/appengine/logdog/coordinator/mutations"
 )
 
 func init() {
 	tmb := tumble.Service{
 		Middleware: func(c context.Context) context.Context {
 			if err := config.UseConfig(&c); err != nil {
 				panic(err)
 			}
 			c = coordinator.UseProdServices(c)
 			return c
 		},
 	}
 
-	router := httprouter.New()
-	tmb.InstallHandlers(router)
+	r := router.New()
+	tmb.InstallHandlers(r)
 
-	http.Handle("/", router)
+	http.Handle("/", r)
 }