Patch by Alexis Menard <alexis.menard@openbossa.org> on 2011-07-26

Patch by Alexis Menard <alexis.menard@openbossa.org> on 2011-07-26
Reviewed by Andreas Kling.

[Qt] Change default backend to use GStreamer on Linux and QuickTime on Mac.
https://bugs.webkit.org/show_bug.cgi?id=63472

Source/JavaScriptCore:

Enable the bits needed for GStreamer only when QtMultimedia is not used.

* wtf/wtf.pri:

Source/WebCore:

Enable the GStreamer backend and the QuickTime backend as default media players
for the Qt port on Mac and Linux. QtMultimedia is now a fallback option that you
can enable by passing DEFINES+=USE_QT_MULTIMEDIA=1 to enforce its usage.

No new tests. The media layout tests are disabled on the Qt port but hopefully with this
switch we can enable them again.

* WebCore.pri:
* WebCore.pro:
* features.pri:

Source/WebKit/qt:

Use the flag WTF_USE_QTKIT=1 rather than USE_QTKIT=1 because that flag doesn't
exist anymore, it's the default. Ditto for GStreamer.

* QtWebKit.pro:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@91752 268f45cc-cd09-0410-ab3c-d52691b4dbfc