[Qt] Enable QML handling of crashed/unresponsive QtWebProcess
https://bugs.webkit.org/show_bug.cgi?id=108474

Forward the processDidCrash, didRelaunchProcess, processDidBecomeUnresponsive
and processDidBecomeResponsive signals to QML's WebView.experimental.

Patch by Milian Wolff <milian.wolff@kdab.com> on 2013-08-01
Reviewed by Jocelyn Turcotte.

* UIProcess/API/qt/qquickwebview.cpp:
(QQuickWebViewPrivate::processDidCrash):
(QQuickWebViewPrivate::didRelaunchProcess):
(QQuickWebViewPrivate::processDidBecomeUnresponsive):
(QQuickWebViewPrivate::processDidBecomeResponsive):
* UIProcess/API/qt/qquickwebview_p.h:
* UIProcess/API/qt/qquickwebview_p_p.h:
(QQuickWebViewPrivate):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@153580 268f45cc-cd09-0410-ab3c-d52691b4dbfc