Using the new Fullscreen API if you switch a video to fullscreen it will scale up and take all the WebView space. Instead we should use the same approach as for the "old" WebKit fullscreen API: create a new window and switch to fullscreen.
Created attachment 117464 [details] Use native fullscreen display when possible
Created attachment 117594 [details] Use native fullscreen display when possible
When you get some spare time, Martin :) Thanks!
Committed r101920: <http://trac.webkit.org/changeset/101920>