Make gitiles calls as Self instead of Anon

common/api/gitiles/gitiles.go

 // Copyright 2016 The LUCI Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //      http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 66 matching lines @@
 
 // Log returns a list of commits based on a repo and treeish (usually
 // a branch). This should be equivilent of a "git log <treeish>" call in
 // that repository.
 func Log(c context.Context, repoURL, treeish string, limit int) ([]Commit, error) {
         // TODO(hinoka): Respect the limit.
         URL, err := fixURL(repoURL, treeish)
         if err != nil {
                 return nil, err
         }
-        t, err := auth.GetRPCTransport(c, auth.NoAuth)
+        t, err := auth.GetRPCTransport(c, auth.AsSelf, auth.WithScopes(
+                "https://www.googleapis.com/auth/gerritcodereview",
+        ))
         if err != nil {
                 return nil, err
         }
         client := http.Client{Transport: t}
         r, err := client.Get(URL)
         if err != nil {
                 return nil, err
         }
         if r.StatusCode != 200 {
                 return nil, fmt.Errorf("Failed to fetch %s, status code %d", URL, r.StatusCode)
         }
         defer r.Body.Close()
         // Strip out the jsonp header, which is ")]}'"
         trash := make([]byte, 4)
         r.Body.Read(trash) // Read the jsonp header
         commits := LogResponse{}
         if err := json.NewDecoder(r.Body).Decode(&commits); err != nil {
                 return nil, err
         }
         // TODO(hinoka): If there is a page and we have gotten less than the limit,
         // keep making requests for the next page until we have enough commits.
         return commits.Log, nil
 }