Update APIs to use new Google cloud paths.

logdog/appengine/coordinator/archivalPublisher.go

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package coordinator
 
 import (
         "time"
 
+        gcps "cloud.google.com/go/pubsub"
         "github.com/golang/protobuf/proto"
         log "github.com/luci/luci-go/common/logging"
         "github.com/luci/luci-go/common/retry"
         "github.com/luci/luci-go/logdog/api/endpoints/coordinator/services/v1"
         "golang.org/x/net/context"
-        gcps "google.golang.org/cloud/pubsub"
 )
 
 // ArchivalPublisher is capable of publishing archival requests.
 type ArchivalPublisher interface {
         // Publish publishes the supplied ArchiveTask.
         Publish(context.Context, *logdog.ArchiveTask) error
 
         // NewPublishIndex returns a new publish index. Each publish index is unique
         // within its request.
         NewPublishIndex() uint64
@@ skipping 34 matching lines @@
                 log.Fields{
                         log.ErrorKey: err,
                         "delay":      d,
                 }.Warningf(c, "Failed to publish task. Retrying...")
         })
 }
 
 func (p *pubsubArchivalPublisher) NewPublishIndex() uint64 {
         return p.publishIndexFunc()
 }