When visiting a page which should contain a full-page PluginView, nothing is displayed. For example, visiting http://www.youtube.com/active_sharing.swf or http://acroeng.adobe.com/Test_Files/quickie/95annrep.pdf with the correct plugins installed should display the PluginView occupying the whole view.
Created attachment 21719 [details] Return true if a mime type is supported by a plugin This fix only part of the problem as there is some other bug preventing plugins to work when they are not contained inside a HTML page.
Created attachment 21840 [details] Completes the fix, r34656 This patch and Marco Barisione's one together fix the problem.
I forgot to add that, when fixed, the Qt port also exhibits bug #18938.
Landed in r34687 and r34688. Thanks Marc!