Simplify memory package interface.

go/src/infra/gae/libs/wrapper/gae/globalinfo.go

Index: go/src/infra/gae/libs/wrapper/gae/globalinfo.go
diff --git a/go/src/infra/gae/libs/wrapper/gae/globalinfo.go b/go/src/infra/gae/libs/wrapper/gae/globalinfo.go
index 7bc50e99d47c4948a317d6f584bebe36949e0830..c4988e0976ed7ec23ff5b2bb515b97d70318a17d 100644
--- a/go/src/infra/gae/libs/wrapper/gae/globalinfo.go
+++ b/go/src/infra/gae/libs/wrapper/gae/globalinfo.go
@@ -14,9 +14,9 @@ import (
 	"infra/gae/libs/wrapper"
 )
 
-// UseGI adds a wrapper.GlobalInfo implementation to context, accessible
+// useGI adds a wrapper.GlobalInfo implementation to context, accessible
 // by wrapper.GetGI(c)
-func UseGI(c context.Context) context.Context {
+func useGI(c context.Context) context.Context {
 	return wrapper.SetGIFactory(c, func(ci context.Context) wrapper.GlobalInfo {
 		return giImpl{ctx(c).Context, ci}
 	})
@@ -65,7 +65,7 @@ func (g giImpl) Namespace(namespace string) (context.Context, error) {
 	if err != nil {
 		return nil, err
 	}
-	return Enable(g.ctx, gaeC), nil
+	return context.WithValue(g.ctx, goonContextKey, gaeC), nil
 }
 func (g giImpl) PublicCertificates() ([]appengine.Certificate, error) {
 	return appengine.PublicCertificates(g)