[milo] {buildbucket,buildbot,swarming,logdog} -> backends/*.

milo/appengine/frontend/frontpage.go

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package frontend
 
 import (
         "github.com/luci/luci-go/server/router"
         "github.com/luci/luci-go/server/templates"
 
         "github.com/luci/luci-go/common/sync/parallel"
         "github.com/luci/luci-go/milo/api/resp"
-        "github.com/luci/luci-go/milo/appengine/buildbot"
-        "github.com/luci/luci-go/milo/appengine/buildbucket"
         "github.com/luci/luci-go/milo/appengine/common"
+        "github.com/luci/luci-go/milo/appengine/job_source/buildbot"
+        "github.com/luci/luci-go/milo/appengine/job_source/buildbucket"
 )
 
 func frontpageHandler(c *router.Context) {
         fp := resp.FrontPage{}
         var mBuildbot, mBuildbucket *resp.CIService
 
         err := parallel.FanOutIn(func(ch chan<- func() error) {
                 ch <- func() (err error) {
                         mBuildbot, err = buildbot.GetAllBuilders(c.Context)
                         return err
@@ skipping 36 matching lines @@
                 },
                 "error": "couldn't find ice cream",
         }
         return []common.TestBundle{
                 {
                         Description: "Basic frontpage",
                         Data:        *data,
                 },
         }
 }