Convert drive::FileWriteHelper to a single function for simplification.

chrome/browser/chromeos/drive/download_handler_unittest.cc

 // Copyright (c) 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 "chrome/browser/chromeos/drive/download_handler.h"
 
 #include "base/files/scoped_temp_dir.h"
 #include "chrome/browser/chromeos/drive/dummy_file_system.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
-#include "chrome/browser/chromeos/drive/file_write_helper.h"
 #include "chrome/browser/chromeos/drive/test_util.h"
 #include "content/public/test/mock_download_item.h"
 #include "content/public/test/mock_download_manager.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace drive {
 
 namespace {
 
@@ skipping 49 matching lines @@
   DownloadHandlerTest()
       : download_manager_(new content::MockDownloadManager) {}
 
   virtual void SetUp() OVERRIDE {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
 
     // Set expectations for download item.
     EXPECT_CALL(download_item_, GetState())
         .WillRepeatedly(testing::Return(content::DownloadItem::IN_PROGRESS));
 
-    file_write_helper_.reset(new FileWriteHelper(&test_file_system_));
-    download_handler_.reset(
-        new DownloadHandler(file_write_helper_.get(), &test_file_system_));
+    download_handler_.reset(new DownloadHandler(&test_file_system_));
     download_handler_->Initialize(download_manager_.get(), temp_dir_.path());
   }
 
  protected:
   base::ScopedTempDir temp_dir_;
   content::TestBrowserThreadBundle thread_bundle_;
   scoped_ptr<content::MockDownloadManager> download_manager_;
   DownloadHandlerTestFileSystem test_file_system_;
-  scoped_ptr<FileWriteHelper> file_write_helper_;
   scoped_ptr<DownloadHandler> download_handler_;
   content::MockDownloadItem download_item_;
 };
 
 TEST_F(DownloadHandlerTest, SubstituteDriveDownloadPathNonDrivePath) {
   const base::FilePath non_drive_path(FILE_PATH_LITERAL("/foo/bar"));
   ASSERT_FALSE(util::IsUnderDriveMountPoint(non_drive_path));
 
   // Call SubstituteDriveDownloadPath()
   base::FilePath substituted_path;
@@ skipping 150 matching lines @@
   download_handler_->CheckForFileExistence(
       &download_item_,
       google_apis::test_util::CreateCopyResultCallback(&file_exists));
   test_util::RunBlockingPoolTask();
 
   // Check the result.
   EXPECT_FALSE(file_exists);
 }
 
 }  // namespace drive