From eae9d5b647b89e547b4229b8b794d91753c9ec95 Mon Sep 17 00:00:00 2001
From: Luca Casonato <hello@lcas.dev>
Date: Thu, 12 Aug 2021 19:16:23 +0200
Subject: [PATCH] fix: Blob#slice arguments should be optional (#11665)

---
 ext/web/09_file.js         | 2 +-
 tools/wpt/expectation.json | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/ext/web/09_file.js b/ext/web/09_file.js
index 516e80adfc..43d9ffcb30 100644
--- a/ext/web/09_file.js
+++ b/ext/web/09_file.js
@@ -220,7 +220,7 @@
      * @param {string} [contentType]
      * @returns {Blob}
      */
-    slice(start, end, contentType) {
+    slice(start = undefined, end = undefined, contentType = undefined) {
       webidl.assertBranded(this, Blob);
       const prefix = "Failed to execute 'slice' on 'Blob'";
       if (start !== undefined) {
diff --git a/tools/wpt/expectation.json b/tools/wpt/expectation.json
index d2c5a31948..827fc9ee55 100644
--- a/tools/wpt/expectation.json
+++ b/tools/wpt/expectation.json
@@ -16443,7 +16443,6 @@
       "filereader_result.any.html": true
     },
     "idlharness.any.html": [
-      "Blob interface: operation slice(optional long long, optional long long, optional DOMString)",
       "FileList interface: existence and properties of interface object",
       "FileList interface object length",
       "FileList interface object name",