https://bugs.webkit.org/show_bug.cgi?id=94702

Reviewed by Kenneth Rohde Christiansen.

Based on patch by Noam Rosenthal.

The conversion uses a simple JSClassRef based binding and only a few
uses of private JSC API for the HTML element DOM bindings remain.

This is essentially used for wrapping QPixmap and QImage types in
JavaScript and the other way around, for retrieving the image data
out of a HTML image element when converting from JS/DOM to Qt.

* bridge/qt/qt_pixmapruntime.cpp:
(JSC::Bindings::copyPixels):
(JSC::Bindings::toPixmap):
(JSC::Bindings::toImage):
(JSC::Bindings::imageSizeForVariant):
(JSC::Bindings::getPixmapWidth):
(JSC::Bindings::getPixmapHeight):
(JSC::Bindings::assignToHTMLImageElement):
(JSC::Bindings::pixmapToImageData):
(JSC::Bindings::pixmapToDataUrl):
(JSC::Bindings::pixmapToString):
(JSC::Bindings::QtPixmapRuntime::toJS):
(JSC::Bindings::QtPixmapRuntime::toQt):
(JSC::Bindings::QtPixmapRuntime::canHandle):
(JSC::Bindings::QtPixmapRuntime::getClassRef):
* bridge/qt/qt_pixmapruntime.h:
(QtPixmapRuntime):
* bridge/qt/qt_runtime.cpp:
(JSC::Bindings::convertValueToQVariant):
(JSC::Bindings::convertQVariantToValue):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@127440 268f45cc-cd09-0410-ab3c-d52691b4dbfc