[Qt] Restore URL Scheme Delegates after QtWebProcess crash

[Qt] Restore URL Scheme Delegates after QtWebProcess crash
https://bugs.webkit.org/show_bug.cgi?id=108808

When the QtWebProcess crashes, the registered URL Scheme
Delegates are not properly restored over IPC in the newly
launched process instance.

Patch by Milian Wolff <milian.wolff@kdab.com> on 2013-02-15
Reviewed by Simon Hausmann.

* UIProcess/API/qt/qquickwebview.cpp:
(QQuickWebViewPrivate::didRelaunchProcess):
(QQuickWebViewPrivate::updateSchemeDelegates):
* UIProcess/API/qt/qquickwebview_p_p.h:
(QQuickWebViewPrivate):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@142997 268f45cc-cd09-0410-ab3c-d52691b4dbfc