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/eventsource/format-utf-8.htm b/src/third_party/web_platform_tests/eventsource/format-utf-8.htm
new file mode 100644
index 0000000..d7858a1
--- /dev/null
+++ b/src/third_party/web_platform_tests/eventsource/format-utf-8.htm
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset=utf-8>
+    <title>EventSource: always UTF-8</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <div id="log"></div>
+    <script>
+      async_test().step(function() {
+        var source = new EventSource("resources/message.py?mime=text/event-stream;charset=windows-1252&message=data%3Aok%E2%80%A6")
+        source.onmessage = this.step_func(function(e) {
+          assert_equals('ok…', e.data, 'decoded data')
+          source.close()
+          this.done()
+        })
+        source.onerror = this.step_func(function() {
+          assert_unreached("Got error event")
+        })
+      })
+    </script>
+  </body>
+</html>
+