drive: Deal with the root directory in the same way as others in MoveOperation.

chrome/browser/chromeos/drive/file_system/move_operation.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_MOVE_OPERATION_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_MOVE_OPERATION_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 65 matching lines @@
                                scoped_ptr<DriveEntryProto> entry_proto);
 
   // Callback for handling resource rename attempt. Renames a file or
   // directory at |file_path| on the client side.
   // |callback| must not be null.
   void RenameEntryLocally(const FilePath& file_path,
                           const FilePath::StringType& new_name,
                           const FileMoveCallback& callback,
                           google_apis::GDataErrorCode status);
 
-  // Removes a file or directory at |file_path| from the current directory if
-  // it's not in the root directory. This essentially moves an entry to the
-  // root directory on the server side.
+  // Removes a file or directory at |file_path| from the current directory.
+  // It moves the entry to a dangle, no-parent state on the server side.
   //
   // Can be called from UI thread. |callback| is run on the calling thread.
   // |callback| must not be null.
-  void RemoveEntryFromNonRootDirectory(const FileMoveCallback& callback,
-                                       DriveFileError error,
-                                       const FilePath& file_path);
+  void RemoveEntryFromDirectory(const FileMoveCallback& callback,
+                                DriveFileError error,
+                                const FilePath& file_path);
 
-  // Part of RemoveEntryFromNonRootDirectory(). Called after
+  // Part of RemoveEntryFromDirectory(). Called after
   // GetEntryInfoPairByPaths() is complete. |callback| must not be null.
-  void RemoveEntryFromNonRootDirectoryAfterEntryInfoPair(
+  void RemoveEntryFromDirectoryAfterEntryInfoPair(
     const FileMoveCallback& callback,
     scoped_ptr<EntryInfoPairResult> result);
 
-  // Moves a file or directory at |file_path| in the root directory to
-  // another directory at |dir_path|. This function does nothing if
-  // |dir_path| points to the root directory.
+  // Moves a file or directory at |file_path| to another directory at
+  // |dir_path|.
   //
   // Can be called from UI thread. |callback| is run on the calling thread.
   // |callback| must not be null.
-  void MoveEntryFromRootDirectory(const FilePath& directory_path,
-                                  const FileOperationCallback& callback,
-                                  DriveFileError error,
-                                  const FilePath& file_path);
+  void AddEntryToDirectory(const FilePath& directory_path,
+                           const FileOperationCallback& callback,
+                           DriveFileError error,
+                           const FilePath& file_path);
 
-  // Part of MoveEntryFromRootDirectory(). Called after
+  // Part of AddEntryToDirectory(). Called after
   // GetEntryInfoPairByPaths() is complete. |callback| must not be null.
-  void MoveEntryFromRootDirectoryAfterGetEntryInfoPair(
+  void AddEntryToDirectoryAfterGetEntryInfoPair(
     const FileOperationCallback& callback,
     scoped_ptr<EntryInfoPairResult> result);
 
   // Moves entry specified by |file_path| to the directory specified by
   // |dir_path| and calls |callback| asynchronously.
   // |callback| must not be null.
   void MoveEntryToDirectory(const FilePath& file_path,
                             const FilePath& directory_path,
                             const FileMoveCallback& callback,
                             google_apis::GDataErrorCode status);
@@ skipping 23 matching lines @@
   // invalidate the weak pointers before any other members are destroyed.
   base::WeakPtrFactory<MoveOperation> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MoveOperation);
 };
 
 }  // namespace file_system
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_MOVE_OPERATION_H_