Bug 1659975 [wpt PR 25104] - Update interfaces/entries-api.idl, a=testonly

Automatic update from web-platform-tests
Update interfaces/entries-api.idl (#25104)

Source: https://github.com/tidoust/reffy-reports/blob/4cba804/ed/idl/entries-api.idl
Build: https://travis-ci.org/tidoust/reffy-reports/builds/719138445
--

wpt-commits: b07784cad292e5e55e3e399462957aeecbeef277
wpt-pr: 25104

testing/web-platform/tests/interfaces/entries-api.idl

@@ -16,7 +16,7 @@ partial interface DataTransferItem {
     FileSystemEntry? webkitGetAsEntry();
 };
 
-callback ErrorCallback = void (DOMException err);
+callback ErrorCallback = undefined (DOMException err);
 
 [Exposed=Window]
 interface FileSystemEntry {
@@ -26,18 +26,18 @@ interface FileSystemEntry {
     readonly attribute USVString fullPath;
     readonly attribute FileSystem filesystem;
 
-    void getParent(optional FileSystemEntryCallback successCallback,
+    undefined getParent(optional FileSystemEntryCallback successCallback,
                    optional ErrorCallback errorCallback);
 };
 
 [Exposed=Window]
 interface FileSystemDirectoryEntry : FileSystemEntry {
     FileSystemDirectoryReader createReader();
-    void getFile(optional USVString? path,
+    undefined getFile(optional USVString? path,
                  optional FileSystemFlags options = {},
                  optional FileSystemEntryCallback successCallback,
                  optional ErrorCallback errorCallback);
-    void getDirectory(optional USVString? path,
+    undefined getDirectory(optional USVString? path,
                       optional FileSystemFlags options = {},
                       optional FileSystemEntryCallback successCallback,
                       optional ErrorCallback errorCallback);
@@ -48,21 +48,21 @@ dictionary FileSystemFlags {
     boolean exclusive = false;
 };
 
-callback FileSystemEntryCallback = void (FileSystemEntry entry);
+callback FileSystemEntryCallback = undefined (FileSystemEntry entry);
 
 [Exposed=Window]
 interface FileSystemDirectoryReader {
-    void readEntries(FileSystemEntriesCallback successCallback,
+    undefined readEntries(FileSystemEntriesCallback successCallback,
                      optional ErrorCallback errorCallback);
 };
-callback FileSystemEntriesCallback = void (sequence<FileSystemEntry> entries);
+callback FileSystemEntriesCallback = undefined (sequence<FileSystemEntry> entries);
 
 [Exposed=Window]
 interface FileSystemFileEntry : FileSystemEntry {
-    void file(FileCallback successCallback,
+    undefined file(FileCallback successCallback,
               optional ErrorCallback errorCallback);
 };
-callback FileCallback = void (File file);
+callback FileCallback = undefined (File file);
 
 [Exposed=Window]
 interface FileSystem {