drive: Add DownloadOperation::EnsureFileDownloadedByResourceId

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

 // Copyright (c) 2012 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_OPERATIONS_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_OPERATIONS_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/drive/file_system_interface.h"
 
@@ skipping 104 matching lines @@
 
   // Wrapper function for touch_operation_.
   // |callback| must not be null.
   void TouchFile(const base::FilePath& file_path,
                  const base::Time& last_access_time,
                  const base::Time& last_modified_time,
                  const FileOperationCallback& callback);
 
   // Wrapper function for download_operation_.
   // |completion_callback| must not be null.
-  void EnsureFileDownloaded(
+  void EnsureFileDownloadedByResourceId(
+      const std::string& resource_id,
+      const ClientContext& context,
+      const GetFileContentInitializedCallback& initialized_callback,
+      const google_apis::GetContentCallback& get_content_callback,
+      const GetFileCallback& completion_callback);
+
+  // Wrapper function for download_operation_.
+  // |completion_callback| must not be null.
+  void EnsureFileDownloadedByPath(
       const base::FilePath& file_path,
       const ClientContext& context,
       const GetFileContentInitializedCallback& initialized_callback,
       const google_apis::GetContentCallback& get_content_callback,
       const GetFileCallback& completion_callback);
 
   // Wrapper function for update_operation_.
   // |callback| must not be null.
   void UpdateFileByResourceId(const std::string& resource_id,
                               const ClientContext& context,
@@ skipping 14 matching lines @@
   scoped_ptr<TouchOperation> touch_operation_;
   scoped_ptr<DownloadOperation> download_operation_;
   scoped_ptr<UpdateOperation> update_operation_;
   scoped_ptr<SearchOperation> search_operation_;
 };
 
 }  // namespace file_system
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_OPERATIONS_H_