As Kling pointed out on webkit-qt@lists.webkit.org the PluginStrategy implementation is wrong. It causes API regression and crashiness.
Created attachment 68089 [details] proposed patch
Attachment 68089 [details] did not pass style-queue: Failed to run "['WebKitTools/Scripts/check-webkit-style']" exit_code: 1 WebKit/qt/WebCoreSupport/WebPlatformStrategies.cpp:36: Alphabetical sorting problem. [build/include_order] [4] WARNING: File exempt from style guide. Skipping: "WebKit/qt/Api/qwebpage.cpp" Total errors found: 1 in 6 files If any of these errors are false positives, please file a bug against check-webkit-style.
> If any of these errors are false positives, please file a bug against check-webkit-style. Sort orders these in the same order so maybe it is a check-webkit-syle bug.
Attachment 68089 [details] did not build on qt: Build output: http://queues.webkit.org/results/4030081
Finally I have realized that check-webkit-style expects system style includes after normal ones. (I have created a bug for the style guideline page that is ambigous: https://bugs.webkit.org/show_bug.cgi?id=46099). I could fix the include order before commit.
Comment on attachment 68089 [details] proposed patch Clearing flags on attachment: 68089 Committed r68039: <http://trac.webkit.org/changeset/68039>
All reviewed patches have been landed. Closing bug.