Added unit annotation supports onto tsmon in go.

appengine/cmd/milo/buildbot/pubsub.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 buildbot
 
 import (
         "bytes"
         "compress/gzip"
         "compress/zlib"
         "encoding/base64"
         "encoding/json"
         "time"
 
         "github.com/luci/gae/service/datastore"
         "github.com/luci/luci-go/common/clock"
         "github.com/luci/luci-go/common/iotools"
         log "github.com/luci/luci-go/common/logging"
         "github.com/luci/luci-go/server/router"
 
         "golang.org/x/net/context"
 
         "github.com/luci/luci-go/common/tsmon/field"
         "github.com/luci/luci-go/common/tsmon/metric"
+        "github.com/luci/luci-go/common/tsmon/types"
 )
 
 var (
         // subName is the name of the pubsub subscription that milo is expecting.
         // TODO(hinoka): This should be read from luci-config.
         subName = "projects/luci-milo/subscriptions/buildbot-public"
 
         // Metrics
         buildCounter = metric.NewCounter(
                 "luci/milo/buildbot_pubsub/builds",
                 "The number of buildbot builds received by Milo from PubSub",
+                types.MetricMetadata{},
                 field.Bool("internal"),
                 field.String("master"),
                 field.String("builder"),
                 field.Bool("finished"),
                 // Status can be one of 3 options.  "New", "Replaced", "Rejected".
                 field.String("status"))
 )
 
 type pubSubMessage struct {
         Attributes map[string]string `json:"attributes"`
@@ skipping 173 matching lines @@
                 if err != nil {
                         log.WithError(err).Errorf(
                                 c, "Could not save master in datastore %s", err)
                         // This is transient, we do want PubSub to retry.
                         h.WriteHeader(500)
                         return
                 }
         }
         h.WriteHeader(200)
 }