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

common/lhttp/client.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 lhttp
 
 import (
         "bytes"
         "encoding/json"
         "errors"
         "fmt"
         "io"
         "io/ioutil"
         "net/http"
         "net/url"
         "os"
         "strings"
 
-        "github.com/luci/luci-go/client/internal/retry"
+        "github.com/luci/luci-go/common/retry"
 )
 
 // Handler is called once or multiple times for each HTTP request that is tried.
 type Handler func(*http.Response) error
 
 // Retriable is a retry.Retriable that exposes the resulting HTTP status
 // code.
 type Retriable interface {
         retry.Retriable
         // Returns the HTTP status code of the last request, if set.
@@ skipping 152 matching lines @@
                 return fmt.Errorf("http request failed: %s (HTTP %d)", http.StatusText(resp.StatusCode), resp.StatusCode)
         }
         // The handler may still return a retry.Error to indicate that the request
         // should be retried even on successful status code.
         return r.handler(resp)
 }
 
 func (r *retriable) Status() int {
         return r.status
 }