Extract GetResolveFile into DownloadOperation.

chrome/browser/chromeos/drive/file_system/drive_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_DRIVE_OPERATIONS_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_DRIVE_OPERATIONS_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/drive/file_system_interface.h"
 
@@ skipping 13 matching lines @@
 namespace internal {
 class FileCache;
 class ResourceMetadata;
 }  // namespace internal
 
 namespace file_system {
 
 class CopyOperation;
 class CreateDirectoryOperation;
 class CreateFileOperation;
+class DownloadOperation;
 class MoveOperation;
 class OperationObserver;
 class RemoveOperation;
 class SearchOperation;
 class UpdateOperation;
 
 // Callback for DriveOperations::Search.
 // On success, |error| is FILE_ERROR_OK, and remaining arguments are valid to
 // use. if |is_update_needed| is true, some mismatch is found between
 // the result from the server and local metadata, so the caller should update
@@ skipping 60 matching lines @@
   void Move(const base::FilePath& src_file_path,
             const base::FilePath& dest_file_path,
             const FileOperationCallback& callback);
 
   // Wrapper function for remove_operation_.
   // |callback| must not be null.
   void Remove(const base::FilePath& file_path,
               bool is_recursive,
               const FileOperationCallback& callback);
 
+  // Wrapper function for download_operation_.
+  // |completion_callback| must not be null.
+  void EnsureFileDownloaded(
+      const base::FilePath& file_path,
+      DriveClientContext 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,
                               DriveClientContext context,
                               const FileOperationCallback& callback);
 
   // Wrapper function for search_operation_.
   // |callback| must not be null.
   void Search(const std::string& search_query,
               const GURL& next_feed,
               const SearchOperationCallback& callback);
 
  private:
   scoped_ptr<CopyOperation> copy_operation_;
   scoped_ptr<CreateDirectoryOperation> create_directory_operation_;
   scoped_ptr<CreateFileOperation> create_file_operation_;
   scoped_ptr<MoveOperation> move_operation_;
   scoped_ptr<RemoveOperation> remove_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_DRIVE_OPERATIONS_H_