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

webkit/fileapi/native_file_util.h

Index: webkit/fileapi/native_file_util.h
diff --git a/webkit/fileapi/native_file_util.h b/webkit/fileapi/native_file_util.h
index ff288e50d13aac3787689b40a332c1430803173c..f0e1329adc02dfb6ca198abd72da67e379253621 100644
--- a/webkit/fileapi/native_file_util.h
+++ b/webkit/fileapi/native_file_util.h
@@ -18,8 +18,18 @@ class Time;
 
 namespace fileapi {
 
+// A thin wrapper class for accessing the OS native filesystem.
+// This performs common error checks necessary to implement FileUtil family
+// in addition to perform native filesystem operations.
+//
+// For the error checks it performs please see the comment for
+// FileSystemFileUtil interface (webkit/fileapi/file_system_file_util.h).
+//
+// Note that all the methods of this class are static and this does NOT
+// inherit from FileSystemFileUtil.
+//
 // TODO(dmikurube): Add unit tests for NativeFileUtil.
-// This class handles accessing the OS native filesystem.
+// http://crbug.com/170564
 class WEBKIT_STORAGE_EXPORT_PRIVATE NativeFileUtil {
  public:
   static base::PlatformFileError CreateOrOpen(
@@ -44,12 +54,11 @@ class WEBKIT_STORAGE_EXPORT_PRIVATE NativeFileUtil {
   static base::PlatformFileError Truncate(const FilePath& path, int64 length);
   static bool PathExists(const FilePath& path);
   static bool DirectoryExists(const FilePath& path);
-  static bool IsDirectoryEmpty(const FilePath& path);
   static base::PlatformFileError CopyOrMoveFile(const FilePath& src_path,
                                                 const FilePath& dest_path,
                                                 bool copy);
   static base::PlatformFileError DeleteFile(const FilePath& path);
-  static base::PlatformFileError DeleteSingleDirectory(const FilePath& path);
+  static base::PlatformFileError DeleteDirectory(const FilePath& path);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(NativeFileUtil);