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/content-security-policy/blink-contrib/script-src-overrides-default-src.sub.html.sub.headers b/src/third_party/web_platform_tests/content-security-policy/blink-contrib/script-src-overrides-default-src.sub.html.sub.headers
new file mode 100644
index 0000000..5d34564
--- /dev/null
+++ b/src/third_party/web_platform_tests/content-security-policy/blink-contrib/script-src-overrides-default-src.sub.html.sub.headers
@@ -0,0 +1,6 @@
+Expires: Mon, 26 Jul 1997 05:00:00 GMT
+Cache-Control: no-store, no-cache, must-revalidate
+Cache-Control: post-check=0, pre-check=0, false
+Pragma: no-cache
+Set-Cookie: script-src-overrides-default-src={{$id:uuid()}}; Path=/content-security-policy/blink-contrib
+Content-Security-Policy: default-src about:; script-src 'self' 'unsafe-inline'; style-src 'self'; connect-src 'self'; report-uri /content-security-policy/support/report.py?op=put&reportID={{$id}}