Import Cobalt 19.master.0.203780

Includes the following patches:
  https://cobalt-review.googlesource.com/c/cobalt/+/5210
    by errong.leng@samsung.com
  https://cobalt-review.googlesource.com/c/cobalt/+/5270
    by linus.wang@samsung.com
diff --git a/src/third_party/web_platform_tests/infrastructure/failing-test.html b/src/third_party/web_platform_tests/infrastructure/failing-test.html
new file mode 100644
index 0000000..249099c
--- /dev/null
+++ b/src/third_party/web_platform_tests/infrastructure/failing-test.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Failing test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+test(function() {
+  assert_unreached("Expected failure");
+});
+</script>