QtBase_dev_Integration #3525: SUCCESS Tested changes (refs/builds/dev_1400538070): http://codereview.qt-project.org/85227 [PS4] - qpa: Rename qwidgetwindow_qpa_p.h to qwidgetwindow_p.h http://codereview.qt-project.org/85224 [PS5] - qpa: Merge qapplication_qpa.cpp into qapplication.cpp