drive: Simplify DownloadOperation by using ResourceEntry::local_id

chrome/browser/chromeos/drive/file_system/download_operation.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_DOWNLOAD_OPERATION_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_DOWNLOAD_OPERATION_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/drive/file_errors.h"
@@ skipping 68 matching lines @@
 
  private:
   // Parameters for EnsureFileDownloaded.
   class DownloadParams;
 
   // Part of EnsureFileDownloaded(). Called upon the completion of precondition
   // check.
   void EnsureFileDownloadedAfterCheckPreCondition(
       scoped_ptr<DownloadParams> params,
       const ClientContext& context,
-      std::string* local_id,
       base::FilePath* drive_file_path,
       base::FilePath* cache_file_path,
       FileError error);
 
   // Part of EnsureFileDownloaded(). Called when it is ready to start
   // downloading the file.
   void EnsureFileDownloadedAfterPrepareForDownloadFile(
       scoped_ptr<DownloadParams> params,
       const ClientContext& context,
-      const std::string& local_id,
       const base::FilePath& drive_file_path,
       base::FilePath* temp_download_file_path,
       FileError error);
 
   // Part of EnsureFileDownloaded(). Called after the actual downloading.
   void EnsureFileDownloadedAfterDownloadFile(
       const base::FilePath& drive_file_path,
-      const std::string& local_id,
       scoped_ptr<DownloadParams> params,
       google_apis::GDataErrorCode gdata_error,
       const base::FilePath& downloaded_file_path);
 
   // Part of EnsureFileDownloaded(). Called after updating local state is
   // completed.
   void EnsureFileDownloadedAfterUpdateLocalState(
       const base::FilePath& file_path,
       scoped_ptr<DownloadParams> params,
       base::FilePath* cache_file_path,
@@ skipping 12 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<DownloadOperation> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(DownloadOperation);
 };
 
 }  // namespace file_system
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_DOWNLOAD_OPERATION_H_