Add DOCTYPE for indent-outdent-after-closing-editable-dialog-element.html
diff --git a/editing/crashtests/indent-outdent-after-closing-editable-dialog-element.html b/editing/crashtests/indent-outdent-after-closing-editable-dialog-element.html
index 7f73de0..3096fb8 100644
--- a/editing/crashtests/indent-outdent-after-closing-editable-dialog-element.html
+++ b/editing/crashtests/indent-outdent-after-closing-editable-dialog-element.html
@@ -1,3 +1,4 @@
+<!DOCTYPE html>
 <html class="reftest-wait">
 <script>
 var eventCount = 0;
@@ -28,4 +29,4 @@
 })
 </script>
 <dialog id="a" contenteditable="true">a</dialog>
-</html>
\ No newline at end of file
+</html>