Bug 1480905 [wpt PR 12305] - Wrap an assert in step_func in a CSP tes…

…t, a=testonly

Automatic update from web-platform-testsWrap an assert in step_func in a CSP test (#12305)

Previously, this test caused a harness error in Firefox and Safari, now
the test itself fails correctly instead.

Found via web-platform-tests/wpt#10877 (comment).
--

wpt-commits: 590992ecaa850723c3300417912a874d94295444
wpt-pr: 12305

testing/web-platform/meta/MANIFEST.json

@@ -452784,7 +452784,7 @@
    "testharness"
   ],
   "content-security-policy/unsafe-hashes/style_attribute_allowed.html": [
-   "69657efda7e158179aad8ab5688e56e344a9b05d",
+   "568c469b063c0faaed83cf9551b56a3bf7d2b3d9",
    "testharness"
   ],
   "content-security-policy/unsafe-hashes/style_attribute_denied_missing_unsafe_hashes.html": [

testing/web-platform/tests/content-security-policy/unsafe-hashes/style_attribute_allowed.html

@@ -17,10 +17,9 @@
     <script>
         var t1 = async_test("Test that the inline style attribute is loaded");
 
-        function check_for_style() {
+        self.check_for_style = t1.step_func_done(function() {
           assert_equals("green", document.getElementById('test').style.background);
-          t1.done();
-        }
+        });
 
         window.addEventListener('securitypolicyviolation', t1.unreached_func("Should have not raised any event"));
     </script>