Disable folder UI when app sync is disabled

ui/app_list/test/app_list_test_view_delegate.cc

 // Copyright 2013 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.
 
 #include "ui/app_list/test/app_list_test_view_delegate.h"
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "ui/app_list/app_list_model.h"
 #include "ui/app_list/app_list_switches.h"
 #include "ui/app_list/app_list_view_delegate_observer.h"
 #include "ui/app_list/test/app_list_test_model.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace app_list {
 namespace test {
 
 AppListTestViewDelegate::AppListTestViewDelegate()
     : dismiss_count_(0),
       toggle_speech_recognition_count_(0),
       open_search_result_count_(0),
       next_profile_app_count_(0),
       model_(new AppListTestModel),
       speech_ui_(SPEECH_RECOGNITION_OFF) {
+  model_->SetFoldersEnabled(true);
 }
 
 AppListTestViewDelegate::~AppListTestViewDelegate() {}
 
 int AppListTestViewDelegate::GetToggleSpeechRecognitionCountAndReset() {
   int count = toggle_speech_recognition_count_;
   toggle_speech_recognition_count_ = 0;
   return count;
 }
 
@@ skipping 79 matching lines @@
   observers_.AddObserver(observer);
 }
 
 void AppListTestViewDelegate::RemoveObserver(
     AppListViewDelegateObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 }  // namespace test
 }  // namespace app_list