Merge CrossFileUtilHelper to FileUtilHelper as Copy() and Move().

webkit/fileapi/file_util_helper.h

Index: webkit/fileapi/file_util_helper.h
diff --git a/webkit/fileapi/file_util_helper.h b/webkit/fileapi/file_util_helper.h
index 91c6e7ab602a571b138cce20c4f5930939bd9e21..494be1f426690d4d54ede1c81fb5c3a5ede8b66e 100644
--- a/webkit/fileapi/file_util_helper.h
+++ b/webkit/fileapi/file_util_helper.h
@@ -17,6 +17,20 @@ class FileSystemPath;
 // FileSystemFileUtilProxy.  The method should be called on FILE thread.
 class FileUtilHelper {
  public:
+  static base::PlatformFileError Copy(
+      FileSystemOperationContext* context,
+      FileSystemFileUtil* src_file_util,
+      FileSystemFileUtil* dest_file_utile,
+      const FileSystemPath& src_root_path,
+      const FileSystemPath& dest_root_path);
+
+  static base::PlatformFileError Move(
+      FileSystemOperationContext* context,
+      FileSystemFileUtil* src_file_util,
+      FileSystemFileUtil* dest_file_utile,
+      const FileSystemPath& src_root_path,
+      const FileSystemPath& dest_root_path);
+
   static base::PlatformFileError Delete(
       FileSystemOperationContext* context,
       FileSystemFileUtil* file_util,