Reviewed/landed by Adam.

    Reviewed/landed by Adam.

        Finally fix font caching. WebKit+Qt now works
        out of the box without any further patches :-)

        * platform/qt/FontDataQt.cpp:
        (WebCore::FontData::platformDestroy):
        * platform/qt/FontPlatformData.h:
        * platform/qt/FontPlatformDataQt.cpp:
        (WebCore::FontPlatformData::FontPlatformData):
        (WebCore::FontPlatformData::isFixedPitch):
        (WebCore::FontPlatformData::font):
        (WebCore::FontPlatformData::fontPtr):
        (WebCore::FontPlatformData::hash):
        (WebCore::FontPlatformData::operator==):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@16034 268f45cc-cd09-0410-ab3c-d52691b4dbfc