[Qt] Unreviewed trivial DRT ASSERT fix

r145805 erroneously added setController calls for device orientation/motion
mock clients. Those ASSERT, the controller ctor already calls setController
on the client.

* WebCoreSupport/QWebPageAdapter.cpp:
(QWebPageAdapter::initializeWebCorePage):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145895 268f45cc-cd09-0410-ab3c-d52691b4dbfc