[Qt] SHOULD NEVER BE REACHED is touched WebCore::InputType::createStepRange

https://bugs.webkit.org/show_bug.cgi?id=121148

Non-steppable input types must not rendered as slider even if its webkit-apperance style
property is set to slider-vertical/horizontal.

Test: platform/qt/fast/forms/range/slider-crash-on-input.html

* platform/qt/RenderThemeQStyle.cpp:
(WebCore::RenderThemeQStyle::paintSliderTrack):

Change-Id: I8428f62d4b0ec92f8cec0ecd0304feda5c1dc13a
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@155651 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@digia.com>
Remove unused WebKit2QML library

This library was introduced after Qt 5.1 as a transition to only using
WebKit2's C API. The transition was never completed and the WebKit2QML
library currently only contains one file and serves no purpose.

Change-Id: Iaa2cc0db5504c957065952b693fc68c8fcb84176
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>