Context: https://github.com/web-platform-tests/wpt/pull/12606

Change the logic of should.throw() so we can handle 3 cases -

should(someExpression).throw();
should(someExpression).throw(TypeError);
should(someExpression).throw(DOMException, 'NotSupportedError');

The generic error (except for DOMException) can be passed without
the second argument, but this change will enforce the second arg
when the expected error is a DOMException type.

This touches many test files, so the work will be done in several
steps:

1. Change audit.js, audionodeoptions.js on both locations.
  (wpt, non-wpt)
2. Update affected test files with the script.
3. Update the rest of test files which can't be updated
  programmatically.

Bug: 865614
Test: All layout tests pass.
Change-Id: I16acacb26c194a0ff950aca05e931195bf55167f
Reviewed-on: https://chromium-review.googlesource.com/1184146


Commit-Queue: Hongchan Choi <hongchan@chromium.org>
Reviewed-by: Raymond Toy <rtoy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587660}