client/isolate: correctly propagate context.Context

client/cmd/isolate/checker.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 main
 
 import (
         "log"
         "time"
 
@@ skipping 48 matching lines @@
 
 // NewChecker creates a NewChecker with the given isolated client.
 // The provided context is used to make all requests to the isolate server.
 func NewChecker(ctx context.Context, client *isolatedclient.Client) *Checker {
         return newChecker(ctx, client)
 }
 
 func newChecker(ctx context.Context, svc isolateService) *Checker {
         c := &Checker{
                 svc: svc,
+                ctx: ctx,
         }
         c.bundler = bundler.NewBundler(checkerItem{}, func(bundle interface{}) {
                 items := bundle.([]checkerItem)
                 if c.err != nil {
                         for _, item := range items {
                                 // Drop any more incoming items.
                                 log.Printf("WARNING dropped %q from Checker", item.item.Path)
                         }
                         return
                 }
@@ skipping 47 matching lines @@
                 if size := item.item.Size; out[i] == nil {
                         c.Hit.addFile(size)
                 } else {
                         c.Miss.addFile(size)
                 }
 
                 item.callback(item.item, out[i])
         }
         return nil
 }