Add Info Testable interface, implement for memory.

filter/count/gi.go

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package count
 
 import (
         "time"
 
         "golang.org/x/net/context"
@@ skipping 126 matching lines @@
 func (g *infoCounter) PublicCertificates() ([]info.Certificate, error) {
         ret, err := g.gi.PublicCertificates()
         return ret, g.c.PublicCertificates.up(err)
 }
 
 func (g *infoCounter) SignBytes(bytes []byte) (string, []byte, error) {
         keyName, signature, err := g.gi.SignBytes(bytes)
         return keyName, signature, g.c.SignBytes.up(err)
 }
 
+func (g *infoCounter) Testable() info.Testable {
+        return g.gi.Testable()
+}
+
 // FilterGI installs a counter GlobalInfo filter in the context.
 func FilterGI(c context.Context) (context.Context, *InfoCounter) {
         state := &InfoCounter{}
         return info.AddFilters(c, func(ic context.Context, gi info.Interface) info.Interface {
                 return &infoCounter{state, gi}
         }), state
 }