Sever isolate cmd dependency on Canceler.

client/cmd/isolate/batch_archive.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 main
 
 import (
         "errors"
         "fmt"
         "os"
@@ skipping 115 matching lines @@
         if c.defaultFlags.Quiet {
                 prefix = ""
         }
         start := time.Now()
         client, err := c.createAuthClient()
         if err != nil {
                 return err
         }
         ctx := c.defaultFlags.MakeLoggingContext(os.Stderr)
         arch := archiver.New(ctx, isolatedclient.New(nil, client, c.isolatedFlags.ServerURL, c.isolatedFlags.Namespace, nil, nil), out)
-        common.CancelOnCtrlC(arch)
+        CancelOnCtrlC(arch)
         type tmp struct {
                 *archiver.Item
                 name string
         }
         items := make(chan *tmp, len(args))
         var wg sync.WaitGroup
         for _, arg := range args {
                 wg.Add(1)
                 go func(genJsonPath string) {
                         defer wg.Done()
@@ skipping 67 matching lines @@
                 fmt.Fprintf(a.GetErr(), "%s: %s\n", a.GetName(), err)
                 return 1
         }
         defer cl.Close()
         if err := c.main(a, args); err != nil {
                 fmt.Fprintf(a.GetErr(), "%s: %s\n", a.GetName(), err)
                 return 1
         }
         return 0
 }