[Qt] EventHandler should handle Space and BackSpace
https://bugs.webkit.org/show_bug.cgi?id=114428

Reviewed by Jocelyn Turcotte.

Source/WebCore:

Enable default space-handling for Qt.

* page/EventHandler.cpp:

Source/WebKit/qt:

Remove our own handling of space and backspace.

* WebCoreSupport/QWebPageAdapter.cpp:
(QWebPageAdapter::handleScrolling):
* WidgetApi/qwebpage.cpp:
(QWebPagePrivate::keyPressEvent):

Source/WebKit2:

Remove our own handling of space and backspace.

* WebProcess/WebPage/qt/WebPageQt.cpp:
(WebKit::WebPage::performDefaultBehaviorForKeyEvent):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148195 268f45cc-cd09-0410-ab3c-d52691b4dbfc