Remove log filtering and add stringsetflag.

common/logging/cloudlog/logging.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 cloudlog
 
 import (
         "crypto/rand"
         "encoding/hex"
         "fmt"
@@ skipping 84 matching lines @@
 }
 
 func (l *boundCloudLogger) LogCall(level logging.Level, calldepth int, f string, args []interface{}) {
         if len(f) == 0 {
                 return
         }
 
         text := fmt.Sprintf(f, args...)
         fields := logging.GetFields(l.ctx)
         if len(fields) > 0 {
-                text = text + " " + fields.FieldString(true)
+                text = text + " " + fields.String()
         }
 
         // Add logging fields to labels.
         entry := cloudlogging.Entry{
                 Timestamp:   clock.Now(l.ctx),
                 Severity:    l.getSeverity(level),
                 Labels:      make(map[string]string, len(fields)),
                 TextPayload: text,
         }
 
@@ skipping 37 matching lines @@
 }
 
 // atomicCounter must be allocated separately. If embedding, use a pointer.
 // Stores current counter value.
 type atomicCounter int64
 
 func (c *atomicCounter) next() int64 {
         nextPlusOne := atomic.AddInt64((*int64)(c), 1)
         return nextPlusOne - 1
 }