Orientation lock still needed?

http://www.w3.org/2011/09/games/#orientation called for a way to lock the
layout orientation on devices such as phones that can be rotated and would
normally re-flow the page.

Is this still needed? Is it addressed by the viewport meta tag?
https://developer.mozilla.org/en/Mobile/Using_the_viewport_meta_tag_to_improve_the_mobile_browsing_experience


(I'm looking to update the chrome bug
http://code.google.com/p/chromium/issues/detail?id=90413)