Move retry and lhttp packages from client/internal to common/.

client/isolatedclient/isolatedclient.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 isolatedclient
 
 import (
         "errors"
         "io"
         "io/ioutil"
         "net/http"
         "strconv"
         "strings"
 
-        "github.com/luci/luci-go/client/internal/lhttp"
-        "github.com/luci/luci-go/client/internal/retry"
         "github.com/luci/luci-go/client/internal/tracer"
         "github.com/luci/luci-go/common/isolated"
+        "github.com/luci/luci-go/common/lhttp"
+        "github.com/luci/luci-go/common/retry"
 )
 
 // IsolateServer is the low-level client interface to interact with an Isolate
 // server.
 type IsolateServer interface {
         ServerCapabilities() (*isolated.ServerCapabilities, error)
         // Contains looks up cache presence on the server of multiple items.
         //
         // The returned list is in the same order as 'items', with entries nil for
         // items that were present.
@@ skipping 135 matching lines @@
         // TODO(maruel): For relatively small file, set request.ContentLength so the
         // TCP connection can be reused.
         resp, err6 := client.Do(request)
         if err6 != nil {
                 return err6
         }
         _, err = io.Copy(ioutil.Discard, resp.Body)
         _ = resp.Body.Close()
         return
 }