[Qt] REGRESSION(r150227): It made zillion tests crash under PlatformStrategiesQt::getPluginInfo
https://bugs.webkit.org/show_bug.cgi?id=116289

Patch by Tim Horton <timothy_horton@apple.com> on 2013-05-18
Reviewed by Csaba Osztrogonác.

Don't try to static cast something that isn't a ChromeClientQt to ChromeClientQt.
It's actually SVGImage's EmptyChromeClient-derived client (or other such things).

* WebCoreSupport/PlatformStrategiesQt.cpp:
(PlatformStrategiesQt::getPluginInfo):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150328 268f45cc-cd09-0410-ab3c-d52691b4dbfc
[CMake] Unreviewed speculative build fix after r150305 and r150306.

* CMakeLists.txt:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150329 268f45cc-cd09-0410-ab3c-d52691b4dbfc