Import wpt@503f5b5f78ec4e87d144f78609f363f0ed0ea8db

third_party/WebKit/LayoutTests/external/wpt/html/semantics/scripting-1/the-script-element/module/errorhandling-wrongMimetype.js

+// This is a plain JavaScript file, but since it will only be accessed with
+// a Content-Type of text/plain and nosniff, it will be seen as invalid.
+// The file itself will have no errors/effects, so if it does actually run,
+// no error will be detected, and the test will fail.
+
+var foo = null;
+export foo;