[milo] fix tests on windows.

milo/build_source/buildbot/html_test.go

 // Copyright 2017 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 buildbot
 
 import (
         "net/http"
         "net/http/httptest"
         "net/url"
@@ skipping 26 matching lines @@
                 Context: c,
                 Params:  p,
                 Writer:  w,
                 Request: r,
         }
 }
 
 func TestHtml(t *testing.T) {
         c := memory.UseWithAppID(context.Background(), "dev~luci-milo")
         c, _ = testclock.UseTime(c, testclock.TestTimeUTC)
-        c = templates.Use(c, common.GetTemplateBundle("../../frontend/templates"))
+        c = templates.Use(c, common.GetTemplateBundle("../../frontend/appengine/templates"))
         c = auth.WithState(c, &authtest.FakeState{Identity: identity.AnonymousIdentity})
         putDSMasterJSON(c, &buildbotMaster{
                 Name:     "fake",
                 Builders: map[string]*buildbotBuilder{"fake": {}},
         }, false)
 
         Convey(`HTML handler tests`, t, func() {
                 Convey(`Build pages`, func() {
                         Convey(`Empty request`, func() {
                                 rc := request(c, nil)
@@ skipping 36 matching lines @@
                         })
                         Convey(`Builder not found`, func() {
                                 rc := request(c, map[string]string{"master": "fake", "builder": "newline"})
                                 BuilderHandler(rc)
                                 response := rc.Writer.(*httptest.ResponseRecorder)
                                 So(response.Code, ShouldEqual, http.StatusNotFound)
                         })
                 })
         })
 }