token-server: Warmup some local caches in /_ah/warmup.

tokenserver/appengine/impl/delegation/warmup.go

Index: tokenserver/appengine/impl/delegation/warmup.go
diff --git a/tokenserver/appengine/impl/certconfig/warmup.go b/tokenserver/appengine/impl/delegation/warmup.go
similarity index 69%
copy from tokenserver/appengine/impl/certconfig/warmup.go
copy to tokenserver/appengine/impl/delegation/warmup.go
index 5c89fa3db805bf0924f6bb71588e85f508abc467..932b206352f788e915b8033ec3bcab93e115ff3e 100644
--- a/tokenserver/appengine/impl/certconfig/warmup.go
+++ b/tokenserver/appengine/impl/delegation/warmup.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
-package certconfig
+package delegation
 
 import (
 	"golang.org/x/net/context"
@@ -11,8 +11,8 @@ import (
 )
 
 func init() {
-	warmup.Register("tokenserver/appengine/impl/certconfig", func(c context.Context) error {
-		// TODO
-		return nil
+	warmup.Register("tokenserver/appengine/impl/delegation", func(c context.Context) error {
+		_, err := DelegationConfigLoader(c)
+		return err
 	})
 }