This test suite comes from
https://github.com/w3c/web-platform-tests
with some modification:
1. the necessary adjustment on reference path to test harness.
2. support/iframe_sandbox_002.htm

 - "<video id='video0' src='" + getVideoURI("http://media.w3.org/2011/01/video/green-at-15") + "'" +
 + "<video id='video0' src='" + getVideoURI("green-at-15") + "'" +


These tests are copyright by W3C and/or the author listed in the test
file. The tests are dual-licensed under the W3C Test Suite License:
http://www.w3.org/Consortium/Legal/2008/04-testsuite-license
and the BSD 3-clause License:
http://www.w3.org/Consortium/Legal/2008/03-bsd-license
under W3C's test suite licensing policy:
http://www.w3.org/Consortium/Legal/2008/04-testsuite-copyright
