(For-try) Divide recursive Copy/Move into multiple async tasks

webkit/fileapi/obfuscated_file_util.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 WEBKIT_FILEAPI_OBFUSCATED_FILE_UTIL_H_
 #define WEBKIT_FILEAPI_OBFUSCATED_FILE_UTIL_H_
 
 #include <map>
 #include <string>
 
@@ skipping 80 matching lines @@
       FilePath* local_path) OVERRIDE;
   virtual base::PlatformFileError Touch(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
       const base::Time& last_access_time,
       const base::Time& last_modified_time) OVERRIDE;
   virtual base::PlatformFileError Truncate(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
       int64 length) OVERRIDE;
-  virtual bool IsDirectoryEmpty(
-      FileSystemOperationContext* context,
-      const FileSystemURL& url) OVERRIDE;
   virtual base::PlatformFileError CopyOrMoveFile(
       FileSystemOperationContext* context,
       const FileSystemURL& src_url,
       const FileSystemURL& dest_url,
       bool copy) OVERRIDE;
   virtual base::PlatformFileError CopyInForeignFile(
         FileSystemOperationContext* context,
         const FilePath& src_file_path,
         const FileSystemURL& dest_url) OVERRIDE;
   virtual base::PlatformFileError DeleteFile(
       FileSystemOperationContext* context,
       const FileSystemURL& url) OVERRIDE;
-  virtual base::PlatformFileError DeleteSingleDirectory(
+  virtual base::PlatformFileError DeleteDirectory(
       FileSystemOperationContext* context,
       const FileSystemURL& url) OVERRIDE;
   virtual base::PlatformFileError CreateSnapshotFile(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
       base::PlatformFileInfo* file_info,
       FilePath* platform_path,
       SnapshotFilePolicy* policy) OVERRIDE;
 
+  // Returns true if the directory |url| is empty.
+  bool IsDirectoryEmpty(
+      FileSystemOperationContext* context,
+      const FileSystemURL& url);
+
   // Gets the topmost directory specific to this origin and type.  This will
   // contain both the directory database's files and all the backing file
   // subdirectories.
   // Returns an empty path if the directory is undefined (e.g. because |type|
   // is invalid). If the directory is defined, it will be returned, even if
   // there is a file system error (e.g. the directory doesn't exist on disk and
   // |create| is false). Callers should always check |error_code| to make sure
   // the returned path is usable.
   FilePath GetDirectoryForOriginAndType(
       const GURL& origin,
@@ skipping 102 matching lines @@
   scoped_ptr<FileSystemOriginDatabase> origin_database_;
   FilePath file_system_directory_;
   base::OneShotTimer<ObfuscatedFileUtil> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(ObfuscatedFileUtil);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_OBFUSCATED_FILE_UTIL_H_