pruneTreeFontData

    150 SimpleFontData::~SimpleFontData()
    151 {
    152     if (!m_fontData)
    153         platformDestroy();
    154 
    155     if (isCustomFont())
    156         GlyphPageTreeNode::pruneTreeCustomFontData(this);
    157     else
    158         GlyphPageTreeNode::pruneTreeFontData(this);
    159 }