According to http://dev.w3.org/2009/dap/file-system/pub/FileSystem/#idl-def-DirectoryReader , the first argument (successCallback) of the readEntries() method is required. This test calls the method without the required parameter and logs the result. WebKit passes this test.
Created attachment 110179 [details] Patch
Comment on attachment 110179 [details] Patch This is redundant with http://trac.webkit.org/browser/trunk/LayoutTests/fast/filesystem/not-enough-arguments.html