- add a copy assignment operator to FontPlatformData on Mac to properly
          retain the m_font data member.

        * platform/graphics/mac/FontPlatformData.h:
        * platform/graphics/mac/FontPlatformDataMac.mm:
        (WebCore::FontPlatformData::FontPlatformData):
        (WebCore::~FontPlatformData):
        (WebCore::FontPlatformData::operator=):
        (WebCore::FontPlatformData::setFont):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@33030 268f45cc-cd09-0410-ab3c-d52691b4dbfc