Switch to HarfBuzz on Mac and remove CoreText shaper

Source/platform/fonts/cocoa/FontPlatformDataCocoa.mm

 /*
  * This file is part of the internal font implementation.
  *
  * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (c) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 272 matching lines @@
 
 SkTypeface* FontPlatformData::typeface() const{
     if (m_typeface)
         return m_typeface.get();
 
     m_typeface = adoptRef(SkCreateTypefaceFromCTFont(ctFont()));
     return m_typeface.get();
 }
 
 #if OS(MACOSX)
-static bool isAATFont(CTFontRef ctFont)
-{
-    CFDataRef table = CTFontCopyTable(ctFont, kCTFontTableMort, 0);
-    if (table) {
-        CFRelease(table);
-        return true;
-    }
-    table = CTFontCopyTable(ctFont, kCTFontTableMorx, 0);
-    if (table) {
-        CFRelease(table);
-        return true;
-    }
-    return false;
-}
-
 HarfBuzzFace* FontPlatformData::harfBuzzFace()
 {
     CTFontRef font = ctFont();
-    // HarfBuzz can't handle AAT font
-    if (isAATFont(font))
-        return 0;
-
     if (!m_harfBuzzFace) {
         uint64_t uniqueID = reinterpret_cast<uintptr_t>(font);
         m_harfBuzzFace = HarfBuzzFace::create(const_cast<FontPlatformData*>(this), uniqueID);
     }
     return m_harfBuzzFace.get();
 }
 #endif
 
 #ifndef NDEBUG
 String FontPlatformData::description() const
 {
     RetainPtr<CFStringRef> cgFontDescription(AdoptCF, CFCopyDescription(cgFont()));
     return String(cgFontDescription.get()) + " " + String::number(m_size)
             + (m_syntheticBold ? " synthetic bold" : "") + (m_syntheticOblique ? " synthetic oblique" : "") + (m_orientation ? " vertical orientation" : "");
 }
 #endif
 
 } // namespace WebCore