Use native Pub/Sub library primitives.

common/gcloud/pubsub/pubsub.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 pubsub
-
-import (
-        "google.golang.org/cloud/pubsub"
-)
-
-// Message is a Google Pub/Sub API message type. It's included here as a
-// convenience so users don't have to import the other library in addition to
-// this one.
-type Message pubsub.Message
-
-func localMessageToPubSub(m []*Message) (ms []*pubsub.Message) {
-        if len(m) > 0 {
-                ms = make([]*pubsub.Message, len(m))
-                for i, msg := range m {
-                        ms[i] = (*pubsub.Message)(msg)
-                }
-        }
-        return
-}
-
-func pubSubMessageToLocal(ms []*pubsub.Message) (m []*Message) {
-        if len(ms) > 0 {
-                m = make([]*Message, len(ms))
-                for i, msg := range ms {
-                        m[i] = (*Message)(msg)
-                }
-        }
-        return
-}