Move DirectoryReader::ReadEntries to FileRef::ReadDirectoryEntries

ppapi/cpp/dev/file_chooser_dev.h

Index: ppapi/cpp/dev/file_chooser_dev.h
diff --git a/ppapi/cpp/dev/file_chooser_dev.h b/ppapi/cpp/dev/file_chooser_dev.h
index 10b0ba0122c7fc2f71d4ca57fe6df537beba3b16..f4dbf3ea81848d09021ca30daddb6ea437aabd6c 100644
--- a/ppapi/cpp/dev/file_chooser_dev.h
+++ b/ppapi/cpp/dev/file_chooser_dev.h
@@ -34,7 +34,7 @@ class FileChooser_Dev : public Resource {
   /// (PP_FILECHOOSERMODE_OPENMULTIPLE). Unlike the HTML5 <input type="file">
   /// tag, a PPB_FileChooser_Dev instance cannot be used to select a directory.
   /// In order to get the list of files in a directory, the
-  /// PPB_DirectoryReader_Dev interface must be used.
+  /// PPB_FileRef::ReadEntries interface must be used.
   ///
   /// @param accept_types A comma-separated list of MIME types and file
   /// extensions such as "audio/ *,text/plain,.html" (note there should be