Fix CoreText performance note on OS X 10.9 (Mavericks).

Upstream Qt bug: https://bugreports.qt-project.org/browse/QTBUG-32789
Upstream patch: https://codereview.qt-project.org/#patch,all,70097,4.
Upstream commit: https://qt.gitorious.org/qt/qt/commit/98352b964f

#11418

src/qt/src/gui/text/qfont.cpp

@@ -1968,6 +1968,8 @@ static void initFontSubst()
         "times new roman", "times",
         "courier new",  "courier",
         "sans serif",   "helvetica",
+#elif defined(Q_WS_MAC)
+        ".lucida grande ui", "lucida grande",
 #elif defined(Q_WS_WIN)
         "times",        "times new roman",
         "courier",      "courier new",

src/qt/src/gui/text/qfontdatabase_mac.cpp

@@ -325,9 +325,15 @@ static QFontEngine *loadFromDatabase(QFontDef &req, const QFontPrivate *d)
     for (int i = 0; i < family_list.size(); ++i) {
         for (int k = 0; k < db->count; ++k) {
             if (db->families[k]->name.compare(family_list.at(i), Qt::CaseInsensitive) == 0) {
-                QByteArray family_name = db->families[k]->name.toUtf8();
 #if defined(QT_MAC_USE_COCOA)
-                QCFType<CTFontRef> ctFont = CTFontCreateWithName(QCFString(db->families[k]->name), 12, NULL);
+                CFStringRef familyName = QCFString::toCFStringRef(db->families[k]->name);
+                QCFType<CTFontDescriptorRef> descriptor = CTFontDescriptorCreateWithAttributes(
+                                    QCFType<CFDictionaryRef>(CFDictionaryCreate(kCFAllocatorDefault,
+                                        (const void**)&kCTFontFamilyNameAttribute,
+                                        (const void**)&familyName, 1,
+                                        &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks)));
+                CFRelease(familyName);
+                QCFType<CTFontRef> ctFont = CTFontCreateWithFontDescriptor(descriptor, 0, NULL);
                 if (ctFont) {
                     fontName = CTFontCopyFullName(ctFont);
                     goto found;