[milo] Refactor all html knowledge out of backends.

milo/buildsource/buildbot/datastore.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 26 matching lines @@
         }
         return &datastore.Batcher{
                 Size: constraints.QueryBatchSize,
         }
 }
 
 // runBuildsQuery takes a buildbotBuild query and returns a list of builds
 // along with a cursor.  We pass the limit here and apply it to the query as
 // an optimization because then we can create a build container of that size.
 func runBuildsQuery(c context.Context, q *datastore.Query, limit int32) (
-        []*buildbotBuild, *datastore.Cursor, error) {
+        []*buildbotBuild, datastore.Cursor, error) {
 
         if limit != 0 {
                 q = q.Limit(limit)
         }
         builds := make([]*buildbotBuild, 0, limit)
-        var nextCursor *datastore.Cursor
+        var nextCursor datastore.Cursor
         err := getBuildQueryBatcher(c).Run(
                 c, q, func(build *buildbotBuild, getCursor datastore.CursorCB) error {
                         builds = append(builds, build)
                         tmpCursor, err := getCursor()
                         if err != nil {
                                 return err
                         }
-                        nextCursor = &tmpCursor
+                        nextCursor = tmpCursor
                         return nil
                 })
         return builds, nextCursor, err
 }