LogDog: Add project support to Storage.

appengine/logdog/coordinator/endpoints/logs/get.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 logs
 
 import (
         "net/url"
         "time"
 
@@ skipping 271 matching lines @@
                 }.Errorf(c, "Failed to execute range request.")
                 return nil, err
         }
 
         return logs, nil
 }
 
 func getTail(c context.Context, st storage.Storage, p types.StreamPath) ([][]byte, error) {
         var data []byte
         err := retry.Retry(c, retry.TransientOnly(retry.Default), func() (err error) {
-                data, _, err = st.Tail(p)
+                data, _, err = st.Tail("", p)
                 return
         }, func(err error, delay time.Duration) {
                 log.Fields{
                         log.ErrorKey: err,
                         "delay":      delay,
                 }.Warningf(c, "Transient error while fetching tail log; retrying.")
         })
         if err != nil {
                 log.WithError(err).Errorf(c, "Failed to fetch tail log.")
                 return nil, err
         }
         return [][]byte{data}, err
 }