Remove options parameter from mediasource.

[qiuzhong]

Part of removing the support of test-level properties from testharness.js

[qiuzhong]

Please don't merge this before #14519 is landed.

[wolenetz]

LGTM. Downstream Chromium/Blink usage of testharness.js in media-source tests still uses test options to customize timeouts, and also there's a mediasource-sourcebufferlist test case in downstream that included a one-off change to overload the options parameter to mediasource_testafterdataloaded in mediasource-util.js to have an "allow_media_element_error" option change the way the util setup the mediasource and element. That element error overload kludginess can be fixed downstream, but I'm uncertain how downstream can maintain custom test case timeouts when #14519 is landed upstream and pulled into downstream. Is there an alternative to the old " { timeout: timeout_in_milliseconds }" option style that I may use downstream, or is such alternative also no longer necessary for some other reason?

[qiuzhong]

Is there an alternative to the old " { timeout: timeout_in_milliseconds }" option style that I may use downstream, or is such alternative also no longer necessary for some other reason?

Please refer to #11120 , test-level timeout property was removed from tests and testharness.js will support it any more. So you'd better not use them it in the tests. Generally, testharness.js will set a default timeout value for each test: 10 seconds. If the tests are slow, you can add <meta name=timeout content=long> in the head of the test html files, that will set the timeout to be 60 seconds.

[zcorpan]

#14519 has not landed yet, adding label to indicate the dependency.