Disable folder UI when app sync is disabled

ui/app_list/views/folder_header_view_unittest.cc

 // Copyright (c) 2014 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/views/folder_header_view.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
@@ skipping 42 matching lines @@
 
 class FolderHeaderViewTest : public views::ViewsTestBase {
  public:
   FolderHeaderViewTest() {}
   virtual ~FolderHeaderViewTest() {}
 
   // testing::Test overrides:
   virtual void SetUp() OVERRIDE {
     views::ViewsTestBase::SetUp();
     model_.reset(new AppListTestModel);
+    model_->SetFoldersEnabled(true);
 
     delegate_.reset(new TestFolderHeaderViewDelegate);
     folder_header_view_.reset(new FolderHeaderView(delegate_.get()));
   }
 
   virtual void TearDown() OVERRIDE {
     folder_header_view_.reset();  // Release apps grid view before models.
     delegate_.reset();
     views::ViewsTestBase::TearDown();
   }
@@ skipping 54 matching lines @@
 
 TEST_F(FolderHeaderViewTest, OemFolderNameNotEditable) {
   AppListFolderItem* folder_item = model_->CreateAndAddOemFolder("oem folder");
   folder_header_view_->SetFolderItem(folder_item);
   EXPECT_EQ("", GetFolderNameFromUI());
   EXPECT_FALSE(CanEditFolderName());
 }
 
 }  // namespace test
 }  // namespace app_list