[custom-elements-tests] Add test cast for instantiation using type extensions (#863)

• From: bonyong lee <web-platform-tests-notifications@w3.org>
• Date: Sat, 12 Apr 2014 06:19:32 GMT
• To: public-web-platform-tests-notifications@w3.org
• Message-Id: <<web-platform-tests_issue_863@w3.org>>

View on GitHub: https://github.com/w3c/web-platform-tests/pull/863

Received on Saturday, 12 April 2014 06:19:38 UTC