Support $262.IsHTMLDDA

There is already a %GetUndetectable runtime test function, so use that.

Bug: v8:7184
Change-Id: I04af03d95c4245ab9c7061cb00d5890972b82f46
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2181195
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67553}

test/test262/BUILD.gn

@@ -17,6 +17,7 @@ group("v8_test262") {
     "harness-adapt.js",
     "harness-adapt-donotevaluate.js",
     "harness-agent.js",
+    "harness-ishtmldda.js",
     "test262.status",
     "testcfg.py",
     "local-tests/",

test/test262/harness-ishtmldda.js

+// Copyright 2020 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+$262.IsHTMLDDA = %GetUndetectable();

test/test262/test262.status

@@ -446,16 +446,6 @@
 
   # https://bugs.chromium.org/p/v8/issues/detail?id=7184
   'annexB/language/expressions/yield/star-iterable-return-emulates-undefined-throws-when-called': [FAIL],
-  'annexB/language/statements/for-await-of/iterator-close-return-emulates-undefined-throws-when-called': [FAIL],
-  'annexB/language/statements/for-of/iterator-close-return-emulates-undefined-throws-when-called': [FAIL],
-
-  # http://crbug/v8/10451
-  'annexB/language/expressions/assignment/dstr/array-pattern-emulates-undefined': [FAIL],
-  'annexB/language/expressions/assignment/dstr/object-pattern-emulates-undefined': [FAIL],
-  'annexB/language/expressions/yield/star-iterable-throw-emulates-undefined-throws-when-called': [FAIL],
-  'annexB/language/statements/const/dstr/array-pattern-emulates-undefined': [FAIL],
-  'annexB/language/statements/const/dstr/object-pattern-emulates-undefined': [FAIL],
-  'annexB/language/statements/function/default-parameters-emulates-undefined': [FAIL],
 
   # https://bugs.chromium.org/p/v8/issues/detail?id=5690
   'language/expressions/call/eval-spread': [FAIL],

test/test262/testcfg.py

@@ -55,6 +55,7 @@ FEATURE_FLAGS = {
   'FinalizationRegistry': '--harmony-weak-refs-with-cleanup-some',
   'WeakRef': '--harmony-weak-refs-with-cleanup-some',
   'host-gc-required': '--expose-gc-as=v8GC',
+  'IsHTMLDDA': '--allow-natives-syntax',
   'top-level-await': '--harmony-top-level-await',
   'regexp-match-indices': '--harmony-regexp-match-indices',
   # https://github.com/tc39/test262/pull/2395
@@ -206,6 +207,8 @@ class TestCase(testcase.D8TestCase):
         list(self.suite.harness) +
         ([os.path.join(self.suite.root, "harness-agent.js")]
          if self.__needs_harness_agent() else []) +
+        ([os.path.join(self.suite.root, "harness-ishtmldda.js")]
+         if "IsHTMLDDA" in self.test_record.get("features", []) else []) +
         ([os.path.join(self.suite.root, "harness-adapt-donotevaluate.js")]
          if self.fail_phase_only and not self._fail_phase_reverse else []) +
         self._get_includes() +