[Qt][WK2] Application URL schemes cause asserts when using debug.

[Qt][WK2] Application URL schemes cause asserts when using debug.
https://bugs.webkit.org/show_bug.cgi?id=76700

Instances of QtNetworkRequestData / QtNetworkReplyData are meant
to be used for transfering data over IPC. To allow transferring
instances of these classes over IPC they need to be copyable,
and it must be possible to create such instances on the stack.
Because classes that inherit from RefCounted always need to be
used in connection with RefPtr, QtNetworkRequestData and
QtNetworkReplyData cannot inherit directly from RefCounted.

Deleting an object that inherits from RefCounted, without
the proper sequence of ref()/deref() being called by it's
RefPtr, causes asserts when running a debug version.

Reviewed by Simon Hausmann.

* Shared/qt/QtNetworkReplyData.h:
(WebKit::QtRefCountedNetworkReplyData::data):
* Shared/qt/QtNetworkRequestData.cpp:
(WebKit::QtRefCountedNetworkRequestData::QtRefCountedNetworkRequestData):
* Shared/qt/QtNetworkRequestData.h:
(WebKit::QtRefCountedNetworkRequestData::data):
* Target.pri:
* UIProcess/API/qt/qquicknetworkreply.cpp:
(QQuickNetworkReply::QQuickNetworkReply):
(QQuickNetworkReply::contentType):
(QQuickNetworkReply::setContentType):
(QQuickNetworkReply::operation):
(QQuickNetworkReply::setOperation):
(QQuickNetworkReply::contentDisposition):
(QQuickNetworkReply::setContentDisposition):
(QQuickNetworkReply::location):
(QQuickNetworkReply::setLocation):
(QQuickNetworkReply::lastModified):
(QQuickNetworkReply::setLastModified):
(QQuickNetworkReply::cookie):
(QQuickNetworkReply::setCookie):
(QQuickNetworkReply::userAgent):
(QQuickNetworkReply::setUserAgent):
(QQuickNetworkReply::server):
(QQuickNetworkReply::setServer):
(QQuickNetworkReply::data):
(QQuickNetworkReply::setData):
(QQuickNetworkReply::send):
(QQuickNetworkReply::networkRequestData):
(QQuickNetworkReply::setNetworkRequestData):
(QQuickNetworkReply::networkReplyData):
* UIProcess/API/qt/qquicknetworkreply_p.h:
* UIProcess/API/qt/qquicknetworkrequest.cpp:
(QQuickNetworkRequest::QQuickNetworkRequest):
(QQuickNetworkRequest::setNetworkRequestData):
(QQuickNetworkRequest::url):
* UIProcess/API/qt/qquicknetworkrequest_p.h:
* UIProcess/API/qt/qquickwebview.cpp:
(QQuickWebViewExperimental::invokeApplicationSchemeHandler):
* UIProcess/API/qt/qquickwebview_p.h:
* UIProcess/WebPageProxy.h:
* UIProcess/qt/QtPageClient.cpp:
(QtPageClient::handleApplicationSchemeRequest):
* UIProcess/qt/QtPageClient.h:
* UIProcess/qt/WebPageProxyQt.cpp:
(WebKit::WebPageProxy::resolveApplicationSchemeRequest):
(WebKit::WebPageProxy::sendApplicationSchemeReply):
* WebProcess/qt/QtNetworkReply.cpp:
(WebKit::QtNetworkReply::setData):
(WebKit::QtNetworkReply::readData):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105711 268f45cc-cd09-0410-ab3c-d52691b4dbfc