Added unit annotation supports onto tsmon in go.

common/tsmon/monitor/acq.go

 // Copyright 2015 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 monitor
 
 import (
         "math"
         "time"
 
@@ skipping 26 matching lines @@
 func SerializeCell(c types.Cell) *pb.MetricsData {
         d := pb.MetricsData{}
         d.Name = proto.String(c.Name)
         d.Description = proto.String(c.Description)
         d.MetricNamePrefix = proto.String(metricNamePrefix)
         d.Fields = field.Serialize(c.Fields, c.FieldVals)
         if c.ValueType.IsCumulative() {
                 d.StartTimestampUs = proto.Uint64(uint64(c.ResetTime.UnixNano() / int64(time.Microsecond)))
         }
         c.Target.PopulateProto(&d)
+        if c.Units.IsSpecified() {
+                d.Units = c.Units.AsProto()
+        }
 
         SerializeValue(c.ValueType, c.Value, &d)
         return &d
 }
 
 // SerializeValue writes one metric's value into the MetricsData message.
 func SerializeValue(typ types.ValueType, value interface{}, d *pb.MetricsData) {
         switch typ {
         case types.NonCumulativeIntType:
                 d.Gauge = proto.Int64(value.(int64))
@@ skipping 73 matching lines @@
         if len(d.Buckets()) == d.Bucketer().NumBuckets() {
                 ret.Overflow = proto.Int64(d.Buckets()[d.Bucketer().NumBuckets()-1])
         }
 
         if d.Count() > 0 {
                 ret.Mean = proto.Float64(d.Sum() / float64(d.Count()))
         }
 
         return &ret
 }