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/service-workers/stub-4.7.4.4-is-reload-attribute.html b/src/third_party/web_platform_tests/service-workers/stub-4.7.4.4-is-reload-attribute.html
new file mode 100644
index 0000000..f116b68
--- /dev/null
+++ b/src/third_party/web_platform_tests/service-workers/stub-4.7.4.4-is-reload-attribute.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+<title>Service Workers: event.isReload</title>
+    <head>
+        <link rel="help" href="https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#is-reload-attribute">
+        <script src="/resources/testharness.js"></script>
+        <script src="/resources/testharnessreport.js"></script>
+
+    </head>
+    <body>
+
+<!--
+
+Returns true if `event` was dispatched with the user's intention for the page
+reload, and false otherwise. Pressing the refresh button should be considered a
+reload while clicking a link and pressing the back button should not. The
+behavior of the `Ctrl+l enter` is left to the implementations of the user
+agents.
+
+-->
+
+
+
+    <script>
+        test(function() {
+            // not_implemented();
+        }, "There are no tests for section event.isReload so far.");
+    </script>
+
+    </body>
+</html>
+