[Qt] Implement the fast font path for Qt.
After this patch 26 tests are different with Qt 4.7 and 4.8.
There isn't any method now to land Qt 4.7 and Qt 4.8 specific
expected result at the same time.
Created attachment 92938 [details]
Comment on attachment 92938 [details]
cq-, because git missed to add the new empty skipped list to the patch
Landed in http://trac.webkit.org/changeset/86141
Revision r86141 cherry-picked into qtwebkit-2.2 with commit 0f9a659 <http://gitorious.org/webkit/qtwebkit/commit/0f9a659>