Revert of Migrate tsmon protos to proto3

common/tsmon/metric/metric_test.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 metric
 
 import (
         "testing"
 
+        "github.com/golang/protobuf/proto"
         "github.com/luci/luci-go/common/tsmon"
         "github.com/luci/luci-go/common/tsmon/distribution"
         "github.com/luci/luci-go/common/tsmon/monitor"
         "github.com/luci/luci-go/common/tsmon/store"
         "github.com/luci/luci-go/common/tsmon/target"
         "github.com/luci/luci-go/common/tsmon/types"
         "golang.org/x/net/context"
 
         . "github.com/smartystreets/goconvey/convey"
 )
 
 func makeContext() context.Context {
         return tsmon.WithState(context.Background(), &tsmon.State{
-                S:                 store.NewInMemory(&target.Task{ServiceName: "default target"}),
+                S:                 store.NewInMemory(&target.Task{ServiceName: proto.String("default target")}),
                 M:                 monitor.NewNilMonitor(),
                 RegisteredMetrics: map[string]types.Metric{},
         })
 }
 
 func TestMetrics(t *testing.T) {
         Convey("Int", t, func() {
                 c := makeContext()
                 m := NewIntIn(c, "foo", "description")
 
@@ skipping 192 matching lines @@
                 So(v.Bucketer().GrowthFactor(), ShouldEqual, 0)
                 So(v.Bucketer().Width(), ShouldEqual, 10)
                 So(v.Bucketer().NumFiniteBuckets(), ShouldEqual, 20)
                 So(v.Sum(), ShouldEqual, 15)
                 So(v.Count(), ShouldEqual, 1)
                 So(err, ShouldBeNil)
 
                 So(func() { NewNonCumulativeDistributionIn(c, "foo", "description", m.Bucketer()) }, ShouldPanic)
         })
 }