Refactor a bit.

impl/prod/info.go

Index: impl/prod/info.go
diff --git a/prod/globalinfo.go b/impl/prod/info.go
similarity index 89%
rename from prod/globalinfo.go
rename to impl/prod/info.go
index dfbb7381186ec202720e08365a79b4b4be292d51..c860bc0095bb03138b01a7f74981b5bdce385555 100644
--- a/prod/globalinfo.go
+++ b/impl/prod/info.go
@@ -7,7 +7,7 @@ package prod
 import (
 	"time"
 
-	"github.com/luci/gae"
+	"github.com/luci/gae/service/info"
 	"golang.org/x/net/context"
 	"google.golang.org/appengine"
 )
@@ -15,7 +15,7 @@ import (
 // useGI adds a gae.GlobalInfo implementation to context, accessible
 // by gae.GetGI(c)
 func useGI(c context.Context) context.Context {
-	return gae.SetGIFactory(c, func(ci context.Context) gae.GlobalInfo {
+	return info.SetFactory(c, func(ci context.Context) info.Interface {
 		return giImpl{ci}
 	})
 }
@@ -55,14 +55,14 @@ func (g giImpl) ModuleName() (name string) {
 func (g giImpl) Namespace(namespace string) (context.Context, error) {
 	return appengine.Namespace(g, namespace)
 }
-func (g giImpl) PublicCertificates() ([]gae.GICertificate, error) {
+func (g giImpl) PublicCertificates() ([]info.Certificate, error) {
 	certs, err := appengine.PublicCertificates(g)
 	if err != nil {
 		return nil, err
 	}
-	ret := make([]gae.GICertificate, len(certs))
+	ret := make([]info.Certificate, len(certs))
 	for i, c := range certs {
-		ret[i] = (gae.GICertificate)(c)
+		ret[i] = info.Certificate(c)
 	}
 	return ret, nil
 }