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/manifest b/src/third_party/web_platform_tests/manifest
new file mode 100755
index 0000000..edebae6
--- /dev/null
+++ b/src/third_party/web_platform_tests/manifest
@@ -0,0 +1,8 @@
+#!/usr/bin/env python
+import os
+import sys
+
+from tools.manifest import update
+
+update.main(default_tests_root=
+            os.path.abspath(os.path.dirname(__file__)))